    Sentenae 1: % what port dars angen taxcity bege to hagpee?    Sentence 2 Oxygen toncity wsualy bepes to occur at Atal pressures  mare than $0 hitpascats (RP), equal to about 0% oxygen comgostton at  amie econ 25 Hees Cereal seeded 2 portal pressure of  abot 21    