2395
He traveled to Houston in late September to attack Bush ' s environmental record at a park in the shadow of an oil refinery .
 Houston, He, Bush, a park in the shadow of an oil refinery, an oil refinery
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 Houston, He, Bush, a park in the shadow of an oil refinery, an oil refinery