We invite you to sponsor a bench.
( We ( ( invite ( you ( to ( sponsor ( a bench ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VB invite) (S (NP (PRP you)) (VP (TO to) (VP (VB sponsor) (NP (DT a) (NN bench)))))) (. .)))
We would be most grateful if you would sponsor a bench.
( We ( ( would ( be ( ( most grateful ) ( if ( you ( would ( sponsor ( a bench ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (MD would) (VP (VB be) (ADJP (ADJP (RBS most) (JJ grateful)) (SBAR (IN if) (S (NP (PRP you)) (VP (MD would) (VP (VB sponsor) (NP (DT a) (NN bench))))))))) (. .)))