Schema: CREATE TABLE table_name_79 (name VARCHAR, built_by_hm_dockyard VARCHAR, laid_down VARCHAR)
Question: What name has pembroke as the built by hm dockyard, and may 1825 as the laid down?
SQL: SELECT name FROM table_name_79 WHERE built_by_hm_dockyard = "pembroke" AND laid_down = "may 1825"