First, injected cannabinoids may not mirror the effects of smoked marijuana.
( First ( , ( ( injected cannabinoids ) ( ( ( may not ) ( mirror ( ( the effects ) ( of ( smoked marijuana ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB First)) (, ,) (NP (JJ injected) (NNS cannabinoids)) (VP (MD may) (RB not) (VP (VB mirror) (NP (NP (DT the) (NNS effects)) (PP (IN of) (NP (JJ smoked) (NN marijuana)))))) (. .)))
It's all the same whether you smoke marijuana or inject it.
( It ( ( ( ( 's all ) ( the same ) ) ( whether ( you ( ( ( smoke marijuana ) or ) ( inject it ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ 's) (RB all) (NP (DT the) (JJ same)) (SBAR (IN whether) (S (NP (PRP you)) (VP (VP (VB smoke) (NP (NN marijuana))) (CC or) (VP (VB inject) (NP (PRP it))))))) (. .)))