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Leonard " Len " Higson is an English professional rugby league footballer of the 1930s and '40s , playing at representative level for England , and at club level for Wakefield Trinity , Leeds , and Bradford Northern , playing in the Forwards , as a , i.e. number 8 or 10 , during the era of contested scrums .
 Leonard, Higson, England, Wakefield Trinity, Leeds, Bradford Northern
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Leonard, Higson, England, Wakefield Trinity, Leeds, Bradford Northern