from the people laughing in the crowd 
(ROOT (PP (IN from) (NP (NP (DT the) (NNS people)) (VP (VBG laughing) (PP (IN in) (NP (DT the) (NN crowd)))))))
(ROOT (PP (IN ) (NP (NP (DT ) (NNS )) (VP (VBG ) (PP (IN ) (NP (DT ) (NN )))))))