Question: How many papers are "Atsushi Ohori" the author of?
SQL: SELECT count(*) FROM authors AS t1 JOIN authorship AS t2 ON t1.authid  =  t2.authid JOIN papers AS t3 ON t2.paperid  =  t3.paperid WHERE  t1.fname  =  "Atsushi" AND t1.lname  =  "Ohori"