27113
In the United States , concern over its negative health effects and the possibility of benzene 's entering the groundwater have led to stringent regulation of gasoline 's benzene content , with limits typically around 1 % .
 location: United States
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: United States 
Answer:
 location: United States