Question: Which papers did the author "Olin Shivers" write? Give me the paper titles.
SQL: SELECT t3.title 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  =  "Olin" AND t1.lname  =  "Shivers"