SELECT annot FROM(
SELECT * FROM (
SELECT A.sid,(Y-W) AS dis1,(Z-X) AS dis2 FROM (
(SELECT qgram.sid, qgram.i AS W, qgram.qg, query.i AS X, query.qg FROM qgram, query, p3pairs WHERE (qgram.qg = p3pairs.qg1 AND query.qg = p3pairs.qg2)) AS A
INNER JOIN
(SELECT qgram.sid, qgram.i AS Y, qgram.qg, query.i AS Z, query.qg FROM qgram, query, p3pairs WHERE (qgram.qg = p3pairs.qg2 AND query.qg = p3pairs.qg1)) AS B
ON A.sid=B.sid AND (Y-W)>2 AND (Y-W)<43)) AS P
WHERE dis1=dis2) AS C
INNER JOIN
pstring
ON C.sid = pstring.sid
GROUP BY annot;