88509
The following day , Tkach placed sixteenth in the qualifying rounds of the women 's double trap by three points behind Canada 's Susan Nattrass , accumulating a score of 90 targets .
 Tkach, Susan Nattrass
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tkach, Susan Nattrass