['Although', 'SNG', 'are', 'connected', 'to', 'a', 'SNS', 'and', 'encourage', 'users', 'to', 'interact', 'with', 'their', 'connections', ',', 'most', 'SNG', 'can', 'be', 'played', 'without', 'any', 'social', 'interaction', '.']