Database: professional_basketball
Question: Among players who were born after 1950, who had offence rebounds rates more than 30%? Please list their last names and first names.
SQL: SELECT DISTINCT T1.lastName, T1.firstName FROM players AS T1 INNER JOIN player_allstar AS T2 ON T1.playerID = T2.playerID WHERE T1.birthDate > 1950 AND CAST(T2.o_rebounds AS REAL) * 100 / T2.rebounds > 30