Table: leninets_submarine
Columns: number
name
meaning
fleet
launched

Question: what fleet is associated with the number L4?
SQL: SELECT "fleet" FROM leninets_submarine WHERE "number" = 'l4'

Question: what number is associated with the baltic fleet and leninets (ленинец)?
SQL: SELECT "number" FROM leninets_submarine WHERE "fleet" = 'baltic' AND "name" = 'leninets (ленинец)'

Question: when was garibaldets (гарибальдиец) launched?
SQL: SELECT "launched" FROM leninets_submarine WHERE "name" = 'garibaldets (гарибальдиец)'

Question: when was the number l6, with a fleet of black sea, launched?
SQL: SELECT "launched" FROM leninets_submarine WHERE "fleet" = 'black sea' AND "number" = 'l6'

Question: what number is associated with the name chartist (чартист)?
SQL: SELECT "number" FROM leninets_submarine WHERE "name" = 'chartist (чартист)'