Matched context for obstruction and hazard

The page lists matched contexts for obstruction and hazard.

Share - obstruction	Share - hazard	Phrase
3.51%	7.45%	present {obstruction or hazard} [perform operation]
15.17%	1.70%	encounter {obstruction or hazard} [perform operation]
3.34%	1.15%	avoid {obstruction or hazard} [perform operation]
1.84%	1.75%	road {obstruction or hazard}
1.10%	0.50%	cause {obstruction or hazard} [perform operation]
1.15%	0.42%	not {obstruction or hazard}