( But ( ( ( ( ( ( ( the truth ) ( of ( the matter ) ) ) ( is ( that ( ( the line ) ( contains ( ( ( ( other products ) , ) mainly ) ( salt water ) ) ) ) ) ) ) , ) and ) ( ( ( natural gas ) ( of course ) ) ( ( is not ) ( collected ( in ( a ( pure form ) ) ) ) ) ) ) . ) )
(ROOT (S (CC But) (S (NP (NP (DT the) (NN truth)) (PP (IN of) (NP (DT the) (NN matter)))) (VP (VBZ is) (SBAR (IN that) (S (NP (DT the) (NN line)) (VP (VBZ contains) (NP (NP (JJ other) (NNS products)) (, ,) (RB mainly) (NP (NN salt) (NN water)))))))) (, ,) (CC and) (S (NP (NP (JJ natural) (NN gas)) (PP (IN of) (NP (NN course)))) (VP (VBZ is) (RB not) (VP (VBN collected) (PP (IN in) (NP (DT a) (JJ pure) (NN form)))))) (. .)))
But the truth of the matter is that the line contains other products, mainly salt water, and natural gas of course is not collected in a pure form.
(ROOT (S (NP (DT A) (NN gas)) (VP (VBZ assumes) (NP (NP (DT the) (NN shape)) (PP (IN of) (NP (PRP$ its) (NN container))))) (. .)))