SCHEMA:
CREATE TABLE table_name_21 (elevator VARCHAR, elevated VARCHAR, cardinalatial_title VARCHAR)
USER:
What is the elevator when elevated is May 16, 1288, and cardinalatial title shows Deacon of S. Adriano?

QUERY:
SELECT elevator FROM table_name_21 WHERE elevated = "may 16, 1288" AND cardinalatial_title = "deacon of s. adriano"