314094
During the course of his career he had singles wins in major grass court tournaments over all-time greats Rod Laver , Roy Emerson and Vic Seixas and over numerous international Davis-Cup mainstays on various surfaces : Luis Ayala , Thomaz Koch , Mario Llamas , Giuseppe Merlo , Istvan Gulyas , Bob Mark , Frew McMillan , Christian Kuhnke , Bob Hewitt , Gordon Forbes , Warren Woodcock , Billy Knight , Ron Holmberg , Dennis Ralston , Barry Mackay , and Tom Brown .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None