Detailed Instructions: In this task, you are given a sentence. You are expected to write the name of the organism substances in the body mentioned in the input. Although there might be several correct answers, you need to write one of them.
Q:  Data were collected by means of a questionnaire from a convenience sample of 509 predominantly well - educated , high - income , married women in the northeastern United States during the last trimester of pregnancy .
A:
sample