CREATE TABLE table_7387 ("Position" TEXT, "Name" TEXT, "Height  ( cm ) " FLOAT, "Weight  ( kg ) " FLOAT, "Birthdate" TEXT, "Birthplace" TEXT, "1997\\u20131998 Team" TEXT)

What position did the player play who weighed less thna 91 kg and was born on March 5, 1977?
SELECT "Position" FROM table_7387 WHERE "Weight (kg)" < '91' AND "Birthdate" = 'march 5, 1977'
SELECT "Position" FROM "table_7387" WHERE "Birthdate" = 'march 5, 1977' AND "Weight (kg)" < '91'