This joint attention to objects and events fosters early language development.
( ( ( This ( joint attention ) ) ( to ( ( objects and ) events ) ) ) ( ( fosters ( early ( language development ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (JJ joint) (NN attention)) (PP (TO to) (NP (NNS objects) (CC and) (NNS events)))) (VP (VBZ fosters) (NP (JJ early) (NN language) (NN development))) (. .)))
Early language development can be fostered by this joint attention. 
( ( Early ( language development ) ) ( ( can ( be ( fostered ( by ( this ( joint attention ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Early) (NN language) (NN development)) (VP (MD can) (VP (VB be) (VP (VBN fostered) (PP (IN by) (NP (DT this) (JJ joint) (NN attention)))))) (. .)))