บทความชิ้นแรกใน LSTM เขียนว่าอะไร ?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What was the first paper on LSTM written ?It is not neccessary to use all the tables.
 cite:  citingpaperid [ int]  citedpaperid [ int] 
SELECT DISTINCT paper.year FROM keyphrase, paper, paperkeyphrase WHERE keyphrase.keyphrasename = 'LSTM' AND paperkeyphrase.keyphraseid = keyphrase.keyphraseid AND paper.paperid = paperkeyphrase.paperid GROUP BY paper.year ORDER BY paper.year