Table: luxembourg_economy_trade_ministers
Columns: minister
party
start_date
end_date
prime_minister

Question: Name the start date with party of pd
SQL: SELECT "start_date" FROM luxembourg_economy_trade_ministers WHERE "party" = 'pd'

Question: Name the minister for end date of 31 july 2004
SQL: SELECT "minister" FROM luxembourg_economy_trade_ministers WHERE "end_date" = '31 july 2004'

Question: Name the party with end date of 22 november 1980
SQL: SELECT "party" FROM luxembourg_economy_trade_ministers WHERE "end_date" = '22 november 1980'

Question: Name the end date for robert goebbels
SQL: SELECT "end_date" FROM luxembourg_economy_trade_ministers WHERE "minister" = 'robert goebbels'

Question: Name the start date with lsap and end date of present day
SQL: SELECT "start_date" FROM luxembourg_economy_trade_ministers WHERE "party" = 'lsap' AND "end_date" = 'present day'