( ( Cut plant ) ( ( ( stems and ) ( insert ( stem ( into ( tubing ( while ( stem ( is ( submerged ( in ( ( a pan ) ( of water ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Cut) (NN plant)) (VP (VP (VBZ stems)) (CC and) (VP (VB insert) (VP (VB stem) (PP (IN into) (S (VP (VBG tubing) (SBAR (IN while) (S (NP (NN stem)) (VP (VBZ is) (VP (VBN submerged) (PP (IN in) (NP (NP (DT a) (NN pan)) (PP (IN of) (NP (NN water))))))))))))))) (. .)))
Cut plant stems and insert stem into tubing while stem is submerged in a pan of water.
(ROOT (S (NP (NNS Stems)) (VP (VBD transport) (NP (NN water)) (PP (TO to) (NP (NP (JJ other) (NNS parts)) (PP (IN of) (NP (DT the) (NN plant))))) (PP (IN through) (NP (NP (DT a) (NN system)) (PP (IN of) (NP (NNS tubes)))))) (. .)))