Database: scholar
Question: how many of dan klein 's papers cite michael i. jordan
SQL:
SELECT DISTINCT COUNT ( t5.citingpaperid ) FROM writes AS t3 JOIN author AS t2 ON t3.authorid  =  t2.authorid JOIN cite AS t5 ON t3.paperid  =  t5.citedpaperid JOIN writes AS t4 ON t4.paperid  =  t5.citingpaperid JOIN author AS t1 ON t4.authorid  =  t1.authorid WHERE t2.authorname  =  "michael i. jordan" AND t1.authorname  =  "dan klein";