instruction: Since 2011 who has published works about IBD ( Inflammatory Bowel Disease ) and diet ?
response: SELECT DISTINCT writes.authorid FROM keyphrase, paper, paperkeyphrase, writes WHERE keyphrase.keyphrasename IN ('IBD', 'diet') AND paperkeyphrase.keyphraseid = keyphrase.keyphraseid AND paper.paperid = paperkeyphrase.paperid AND paper.year > 2011 AND writes.paperid = paper.paperid GROUP BY writes.authorid