CREATE TABLE table_name_7 (elevated VARCHAR(255), elevator VARCHAR(255), cardinalatial_order_and_title VARCHAR(255))
What is the date of elevation for the Cardinal elevated by Nicholas III to the title of Cardinal-Deacon of S. Eustachio?
    
SQL: SELECT elevated FROM table_name_7 WHERE elevator = "nicholas iii" AND cardinalatial_order_and_title = "cardinal-deacon of s. eustachio"