SELECT "Election" FROM table_73372 WHERE "Seat no 1" = 'Jacques Lachapelle' AND "Seat no 5" = 'G. Sanscartier'
which election had seat no 1 filled by jacques lachapelle but seat no 5 was filled by g. sanscartier
CREATE TABLE table_73372 (
    "Election" text,
    "Mayor" text,
    "Seat no 1" text,
    "Seat no 2" text,
    "Seat no 3" text,
    "Seat no 4" text,
    "Seat no 5" text,
    "Seat no 6" text
)