These advancements simply would not have been available without contributions from alumni and friends of the school.
( ( These advancements ) ( simply ( ( ( would not ) ( have ( ( been ( available ( without contributions ) ) ) ( from ( ( ( alumni and ) friends ) ( of ( the school ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (DT These) (NNS advancements)) (ADVP (RB simply)) (VP (MD would) (RB not) (VP (VB have) (VP (VBN been) (ADJP (JJ available) (PP (IN without) (NP (NNS contributions)))) (PP (IN from) (NP (NP (NNS alumni) (CC and) (NNS friends)) (PP (IN of) (NP (DT the) (NN school)))))))) (. .)))
The alumni and friends of the school contributed. 
( ( ( The ( ( alumni and ) friends ) ) ( of ( the school ) ) ) ( contributed . ) )
(ROOT (S (NP (NP (DT The) (NNS alumni) (CC and) (NNS friends)) (PP (IN of) (NP (DT the) (NN school)))) (VP (VBD contributed)) (. .)))