Task: Question Answering
Input (English): Passage: While diving off the Miami coast seeking one of the eleven fabled Spanish Galleons sunk in 1591, private investigator Tony Rome discovers a dead woman, her feet encased in cement, at the bottom of the ocean.
Rome reports this to Lieutenant Dave Santini and thinks nothing more of the incident, until Waldo Gronski hires him to find a missing woman, Sandra Lomax. Gronski has little in the way of affluence, so he allows Rome to pawn his watch to retain his services.
After investigating the local hotspots and picking up on a few names, Rome soon comes across Kit Forrester, whose party Sandra Lomax was supposed to have attended. Rome's talking to Forrester raises the ire of racketeer Al Mungar, a supposedly reformed gangster who looks after Kit's interests.
Thinking there may be a connection between Lomax, Forrester and Mungar, Rome starts probing into their backgrounds and begins a romantic relationship with Kit. With both cops and crooks chasing him and the omnipresent Gronski breathing down his neck, Rome finds himself deep in a case which provides few answers. 
Question: What is the last name of the person who hires the investigator after he reports the woman to the lieutenant?
Output (English): Gronski.