Table: us_house_1994_elections
Columns: district
incumbent
party
first_elected
status
opponent

Question: Who opposed Marty Meehan in each election?
SQL: SELECT "opponent" FROM us_house_1994_elections WHERE "incumbent" = 'Marty Meehan'

Question: Who are the opponents in Massachusetts5 district?
SQL: SELECT "opponent" FROM us_house_1994_elections WHERE "district" = 'Massachusetts5'

Question: What parties are represented in Massachusetts4 district?
SQL: SELECT "party" FROM us_house_1994_elections WHERE "district" = 'Massachusetts4'

Question: Who is the incumbent in district Massachusetts7?
SQL: SELECT "incumbent" FROM us_house_1994_elections WHERE "district" = 'Massachusetts7'