2531
The sharp falloff in economic growth in the summer and mounting evidence of more recent weakness , including disappointing Christmas sales , have increased worries about whether America ' s record 10 - year economic expansion was in danger of toppling into a recession .
 America
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:
 America