It came over the chat.
( It ( ( came ( over ( the chat ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD came) (PP (IN over) (NP (DT the) (NN chat)))) (. .)))
They used a phone call to relay the message.
( They ( ( used ( ( a phone ) ( call ( to ( relay ( the message ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBD used) (SBAR (S (NP (DT a) (NN phone)) (VP (VBP call) (S (VP (TO to) (VP (VB relay) (NP (DT the) (NN message))))))))) (. .)))