The oxygen masks on most airliners are unable to provide effective protection because most of them allow the passengers to breath ambient cabin air along with the supplementary oxygen.
(The oxygen masks on most airliners; are; unable to provide effective protection; because most of them allow the passengers to breath ambient cabin air along with the supplementary oxygen) (The oxygen masks on most airliners; to provide; effective protection) (most of them; allow; the passengers to breath ambient cabin air along with the supplementary oxygen) Context(most of them allow,List([86, 104))):(the passengers; to breath; ambient cabin air)
most of them allow,List([86, 104))
The oxygen masks on most airliners The oxygen masks on most airliners most of them the passengers
are to provide allow to breath
unable to provide effective protection because most of them allow the passengers to breath ambient cabin air along with the supplementary oxygen
effective protection
the passengers to breath ambient cabin air along with the supplementary oxygen
ambient cabin air