CREATE TABLE table_73372 ("Election" CLOB, "Mayor" CLOB, "Seat no 1" CLOB, "Seat no 2" CLOB, "Seat no 3" CLOB, "Seat no 4" CLOB, "Seat no 5" CLOB, "Seat no 6" CLOB)

which election had seat no 1 filled by jacques lachapelle but seat no 5 was filled by g. sanscartier
SELECT "Election" FROM table_73372 WHERE "Seat no 1" = 'Jacques Lachapelle' AND "Seat no 5" = 'G. Sanscartier'
SELECT "Election" FROM "table_73372" WHERE "Seat no 1" = 'Jacques Lachapelle' AND "Seat no 5" = 'G. Sanscartier'