Question: Which builder completed after 1889?
SQL: SELECT "Builder" FROM "2-15344743-1" WHERE "Completed" > 1889.0;

Question: Which builder completed before 1890 and launched on 9 June 1888?
SQL: SELECT "Builder" FROM "2-15344743-1" WHERE "Completed" < 1890.0 AND "Launched" = '9 June 1888';

Question: What is the name of the boat that was built by Chatham and Laid down of 25 April 1887?
SQL: SELECT "Name" FROM "2-15344743-1" WHERE "Builder" = 'Chatham' AND "Laid down" = '25 April 1887';

Question: What boat was laid down on 25 April 1887?
SQL: SELECT "Name" FROM "2-15344743-1" WHERE "Laid down" = '25 April 1887';

Question: When did Chatham complete the HMSMedusa?
SQL: SELECT "Completed" FROM "2-15344743-1" WHERE "Builder" = 'Chatham' AND "Name" = 'HMSMedusa';