If any of us at the dental school can be of assistance, please write or call.
( ( If ( ( any ( of ( us ( at ( the ( dental school ) ) ) ) ) ) ( can ( be ( of assistance ) ) ) ) ) ( , ( ( please ( ( write or ) call ) ) . ) ) )
(ROOT (S (SBAR (IN If) (S (NP (NP (DT any)) (PP (IN of) (NP (NP (PRP us)) (PP (IN at) (NP (DT the) (JJ dental) (NN school)))))) (VP (MD can) (VP (VB be) (PP (IN of) (NP (NN assistance))))))) (, ,) (VP (VB please) (VP (VB write) (CC or) (VB call))) (. .)))
The dental school may or may not be able to help.
( ( The ( dental school ) ) ( ( ( ( ( may or ) may ) not ) ( be ( able ( to help ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ dental) (NN school)) (VP (MD may) (CC or) (MD may) (RB not) (VP (VB be) (ADJP (JJ able) (S (VP (TO to) (VP (VB help))))))) (. .)))