An Invitation to Sponsor a Bench
( ( An Invitation ) ( to ( Sponsor ( a Bench ) ) ) )
(ROOT (S (NP (DT An) (NNP Invitation)) (VP (TO to) (VP (VB Sponsor) (NP (DT a) (NNP Bench))))))
An offer to Sponsor a bench. 
( ( An offer ) ( ( to ( Sponsor ( a bench ) ) ) . ) )
(ROOT (S (NP (DT An) (NN offer)) (VP (TO to) (VP (VB Sponsor) (NP (DT a) (NN bench)))) (. .)))