An approach is provided that ingests question-answer pairs from an online discussion site into a question answering (QA) system by preprocessing the online discussion site prior to ingesting the data. The preprocessing of the online discussion site is performed by identifying stale questions posted to the online discussion site, analyzing the stale question to determine an appropriate trigger post, with the trigger post is designed to instigate an answer to the stale question, with the system automatically generating and posting the trigger post to the online discussion site.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A method implemented by an information handling system that includes a processor and a memory accessible by the processor, the method comprising: ingesting question-answer pairs from an online discussion site into a question answering (QA) system by preprocessing the online discussion site prior to ingesting, wherein the preprocessing of the online discussion site further comprises: identifying a stale question in the online discussion site, wherein an answer to the stale question is not detected as being posted to the online discussion site; analyzing the identified stale question to determine a trigger post, wherein the trigger post is designed to instigate the answer to the stale question to be posted to the online discussion site; automatically generating the trigger post; and automatically posting the generated trigger post to the online discussion site. 2. The method of claim 1 wherein the preprocessing further comprises: analyzing a plurality of previously posted trigger posts found in the online discussion site, wherein the previously posted trigger posts correspond to previously posted stale questions and responsive answers that were posted after the previously posted trigger posts, wherein the analysis determines an effectiveness of the previously posted trigger posts in instigating the responsive answers. 3. The method of claim 2 wherein the preprocessing further comprises: identifying an elapsed time between each of the previously posted trigger posts and the corresponding responsive answers, wherein the effectiveness is based on the identified elapsed time. 4. The method of claim 2 wherein the preprocessing further comprises: identifying a question type pertaining to each of the previously posted stale questions; comparing the identified question types with the corresponding previously posted trigger posts; and identifying one or more trigger post types that are effective in instigating responsive answers to the previously posted stale answers, wherein the effectiveness is based on the question type and the corresponding identified trigger post types. 5. The method of claim 4 wherein the preprocessing further comprises: comparing a question text corresponding to the identified stale question with a plurality of question texts corresponding to the previously posted stale questions, wherein the trigger post is selected based on the comparison. 6. The method of claim 5 wherein the preprocessing further comprises: identifying a plurality of trigger post candidates that includes the trigger post; comparing a set of metadata corresponding to each of the trigger post candidates to a set of metadata corresponding to the identified stale question; and selecting the trigger post from the plurality of trigger post candidates based on the comparison. 7. The method of claim 1 wherein the preprocessing further comprises: analyzing a plurality of previously posted trigger posts found in the online discussion site, wherein the previously posted trigger posts correspond to previously posted stale questions that were posted after the previously posted trigger posts; identifying an elapsed time metric between the previously posted trigger posts and their corresponding previously posted stale questions; and using the elapsed time metric to determine when a question posted to the online discussion site becomes stale. 8. An information handling system comprising: one or more processors; a memory coupled to at least one of the processors; and a set of computer program instructions stored in the memory and executed by at least one of the processors in order to perform actions comprising: ingesting question-answer pairs from an online discussion site into a question answering (QA) system by preprocessing the online discussion site prior to ingesting, wherein the preprocessing of the online discussion site further comprises: identifying a stale question in the online discussion site, wherein an answer to the stale question is not detected as being posted to the online discussion site; analyzing the identified stale question to determine a trigger post, wherein the trigger post is designed to instigate the answer to the stale question to be posted to the online discussion site; automatically generating the trigger post; and automatically posting the generated trigger post to the online discussion site. 9. The information handling system of claim 8 wherein the preprocessing further comprises: analyzing a plurality of previously posted trigger posts found in the online discussion site, wherein the previously posted trigger posts correspond to previously posted stale questions and responsive answers that were posted after the previously posted trigger posts, wherein the analysis determines an effectiveness of the previously posted trigger posts in instigating the responsive answers. 10. The information handling system of claim 9 wherein the preprocessing further comprises: identifying an elapsed time between each of the previously posted trigger posts and the corresponding responsive answers, wherein the effectiveness is based on the identified elapsed time. 11. The information handling system of claim 9 wherein the preprocessing further comprises: identifying a question type pertaining to each of the previously posted stale questions; comparing the identified question types with the corresponding previously posted trigger posts; and identifying one or more trigger post types that are effective in instigating responsive answers to the previously posted stale answers, wherein the effectiveness is based on the question type and the corresponding identified trigger post types. 12. The information handling system of claim 11 wherein the preprocessing further comprises: comparing a question text corresponding to the identified stale question with a plurality of question texts corresponding to the previously posted stale questions, wherein the trigger post is selected based on the comparison. 13. The information handling system of claim 12 wherein the preprocessing further comprises: identifying a plurality of trigger post candidates that includes the trigger post; comparing a set of metadata corresponding to each of the trigger post candidates to a set of metadata corresponding to the identified stale question; and selecting the trigger post from the plurality of trigger post candidates based on the comparison. 14. The information handling system of claim 8 wherein the preprocessing further comprises: analyzing a plurality of previously posted trigger posts found in the online discussion site, wherein the previously posted trigger posts correspond to previously posted stale questions that were posted after the previously posted trigger posts; identifying an elapsed time metric between the previously posted trigger posts and their corresponding previously posted stale questions; and using the elapsed time metric to determine when a question posted to the online discussion site becomes stale. 15. A computer program product stored in a computer readable storage medium, comprising computer program code that, when executed by an information handling system, performs actions comprising: ingesting question-answer pairs from an online discussion site into a question answering (QA) system by preprocessing the online discussion site prior to ingesting, wherein the preprocessing of the online discussion site further comprises: identifying a stale question in the online discussion site, wherein an answer to the stale question is not detected as being posted to the online discussion site; analyzing the identified stale question to determine a trigger post, wherein the trigger post is designed to instigate the answer to the stale question to be posted to the online discussion site; automatically generating the trigger post; and automatically posting the generated trigger post to the online discussion site. 16. The computer program product of claim 15 wherein the preprocessing further comprises: analyzing a plurality of previously posted trigger posts found in the online discussion site, wherein the previously posted trigger posts correspond to previously posted stale questions and responsive answers that were posted after the previously posted trigger posts, wherein the analysis determines an effectiveness of the previously posted trigger posts in instigating the responsive answers. 17. The computer program product of claim 16 wherein the preprocessing further comprises: identifying an elapsed time between each of the previously posted trigger posts and the corresponding responsive answers, wherein the effectiveness is based on the identified elapsed time. 18. The computer program product of claim 16 wherein the preprocessing further comprises: identifying a question type pertaining to each of the previously posted stale questions; comparing the identified question types with the corresponding previously posted trigger posts; and identifying one or more trigger post types that are effective in instigating responsive answers to the previously posted stale answers, wherein the effectiveness is based on the question type and the corresponding identified trigger post types. 19. The computer program product of claim 18 wherein the preprocessing further comprises: comparing a question text corresponding to the identified stale question with a plurality of question texts corresponding to the previously posted stale questions, wherein the trigger post is selected based on the comparison. 20. The computer program product of claim 19 wherein the preprocessing further comprises: identifying a plurality of trigger post candidates that includes the trigger post; comparing a set of metadata corresponding to each of the trigger post candidates to a set of metadata corresponding to the identified stale question; and selecting the trigger post from the plurality of trigger post candidates based on the comparison.