420
In 1881 , David Starr Jordan and Charles Henry Gilbert observed that this sucker " occurs in Utah Lake in numbers which are simply enormous " ; the population seems to have boomed and crashed several times since then .
 person: David Starr Jordan; person: Charles Henry Gilbert; location: Utah Lake
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: David Starr Jordan; person: Charles Henry Gilbert; location: Utah Lake