( ( ( ( Biological pollutants ) , ) ( including ( ( ( ( ( ( ( ( ( ( ( molds , ) bacteria ) , ) viruses ) , ) pollen ) , ) ( dust mites ) ) , ) and ) ( animal dander ) ) ) ) ( ( ( ( promote ( poor ( indoor ( air quality ) ) ) ) and ) ( may ( be ( ( a ( major cause ) ) ( of ( days ( lost ( from ( ( work and ) school ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Biological) (NNS pollutants)) (, ,) (PP (VBG including) (NP (NP (NNS molds)) (, ,) (NP (NNS bacteria)) (, ,) (NP (NNS viruses)) (, ,) (NP (NN pollen)) (, ,) (NP (NN dust) (NNS mites)) (, ,) (CC and) (NP (NN animal) (NN dander))))) (VP (VP (VBP promote) (NP (JJ poor) (NX (JJ indoor) (NN air) (NN quality)))) (CC and) (VP (MD may) (VP (VB be) (NP (NP (DT a) (JJ major) (NN cause)) (PP (IN of) (NP (NP (NNS days)) (VP (VBN lost) (PP (IN from) (NP (NN work) (CC and) (NN school)))))))))) (. .)))
Biological pollutants, including molds, bacteria, viruses, pollen, dust mites, and animal dander promote poor indoor air quality and may be a major cause of days lost from work and school.
(ROOT (S (NP (NP (NNS Molds)) (, ,) (NP (NN pollen)) (, ,) (CC and) (NP (JJ pet) (NN dander))) (VP (VBP are) (NP (NP (NNS examples)) (PP (IN of) (NP (NP (NN air) (NN pollution)) (PP (IN with) (NP (JJ biological) (NNS sources))))))) (. .)))