83727
It comprised ten cargo ships , three landing ships , tank ( LSTs ) and an escort of five corvette s. The Japanese submarine I-174 attacked the convoy on 16 June , sinking the United States Army transport ship Portmar and damaging USS LST-469 .
 United States Army
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United States Army