How many players who were born in 1980 weigh 185 in pounds?
born in 1980 refers to birthyear = 1980; weigh 185 in pounds refers to weight_in_lbs = 185;
SELECT COUNT(T2.ELITEID) FROM weight_info AS T1 INNER JOIN PlayerInfo AS T2 ON T1.weight_id = T2.weight WHERE T1.weight_in_lbs = 185 AND strftime('%Y', T2.birthdate) = '1980'