SELECT t2.title FROM authorship AS t1 JOIN papers AS t2 ON t1.paperid  =  t2.paperid WHERE t1.authorder  =  (SELECT max(authorder) FROM authorship)
Which paper has the most authors? Give me the paper title.
[Schema (values) (types)]: | icfp_1 |  Inst : instid (text) , name (number) , country (text) | Authors : authid (text) , lname (number) , fname (text) | Papers : paperid (text) , title (number) | Authorship : authid (text) , instid (number) , paperid (text) , authorder (text);