SELECT t1.name FROM ship AS t1 JOIN captain AS t2 ON t1.ship_id  =  t2.ship_id GROUP BY t2.ship_id HAVING count(*)  >  1
Find the name of the ships that have more than one captain.
[Schema (values) (types)]: | ship_1 |  captain : captain_id (text) , name (number) , ship_id (text) , age (number) , class (text) , rank (text) | Ship : ship_id (text) , name (number) , type (text) , built_year (number) , class (text) , flag (text);