49749
Martyn Andrew Grimley ( born 24 January 1963 ) is a former field hockey player , who won a gold medal with the British Olympic squad at the 1988 Summer Olympics in Seoul .
 Martyn, Grimley, Seoul
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Martyn, Grimley, Seoul