( ( Microorganism ( ( ( A ( microscopic organism ) ) , ) ( ( usually single-celled ) ( -LRB- ( ( ( those ( of ( medical interest ) ) ) ( may ( include ( organisms ( of ( ( bacteria , ) ( virus ( , ( yeast ( , ( and mold ) ) ) ) ) ) ) ) ) ) ) -RRB- ) ) ) ) ) . )
(ROOT (S (VP (VB Microorganism) (NP (NP (DT A) (JJ microscopic) (NN organism)) (, ,) (ADJP (ADJP (RB usually) (JJ single-celled)) (PRN (-LRB- -LRB-) (S (NP (NP (DT those)) (PP (IN of) (NP (JJ medical) (NN interest)))) (VP (MD may) (VP (VB include) (NP (NP (NNS organisms)) (PP (IN of) (NP (NP (NNS bacteria)) (, ,) (NP (NN virus) (, ,) (NN yeast) (, ,) (CC and) (NN mold)))))))) (-RRB- -RRB-))))) (. .)))
Microorganism A microscopic organism, usually single-celled (those of medical interest may include organisms of bacteria, virus, yeast, and mold).
(ROOT (S (NP (NNP Single-celled)) (VP (VBP are) (ADJP (JJ yeasts))) (. .)))