CREATE TABLE table_name_50 (height INT, position VARCHAR, player VARCHAR)

Which Height has a Position of c, and a Player of yiannis bourousis?
SELECT SUM(height) FROM table_name_50 WHERE position = "c" AND player = "yiannis bourousis"
SELECT SUM("height") FROM "table_name_50" WHERE "c" = "position" AND "player" = "yiannis bourousis"