CREATE TABLE table_name_19 (rank INT, lowest_point VARCHAR, canton VARCHAR)

What rank is Vaud with the lowest point is Lake Geneva?
SELECT SUM(rank) FROM table_name_19 WHERE lowest_point = "lake geneva" AND canton = "vaud"
SELECT SUM("rank") FROM "table_name_19" WHERE "canton" = "vaud" AND "lake geneva" = "lowest_point"