passages.id: split_5_test_2028_passage
passages.type: progene_text
passages.text: This atmospheric survey reports : 1 ) airborne pollen contributors in Philadelphia , Pennsylvania ( 1991 to 1997 ) and suburban Cherry Hill , New Jersey ( 1995 to 1997 ) ; 2 ) pollen onset , duration , and peak level ; and 3) the relationship between airborne pollen and selected meteorologic variables .