Matched context for purify and redirect

The page lists matched contexts for purify and redirect.

Share - purify	Share - redirect	Phrase
18.01%	25.97%	{purify or redirect} gas [perform operation]
0.57%	7.11%	{purify or redirect} fuel [perform operation]
0.48%	7.04%	{purify or redirect} air [perform operation]
0.39%	4.93%	engine [does] {purify or redirect}