( ( Examples ( of ( ( common infections ) ( caused ( by viruses ) ) ) ) ) ( ( are ( the ( common ( cold ( , ( ( influenza and ) chickenpox ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Examples)) (PP (IN of) (NP (NP (JJ common) (NNS infections)) (VP (VBN caused) (PP (IN by) (NP (NNS viruses))))))) (VP (VBP are) (NP (DT the) (JJ common) (NN cold) (, ,) (NN influenza) (CC and) (NN chickenpox))) (. .)))
Examples of common infections caused by viruses are the common cold, influenza and chickenpox.
(ROOT (S (NP (NP (DT The) (JJ common) (NN cold)) (CC and) (NP (NN flu))) (VP (VBP are) (NP (NP (NNS examples)) (PP (IN of) (NP (NP (JJ human) (NNS diseases)) (VP (VBN caused) (PP (IN by) (NP (NNS viruses)))))))) (. .)))