The thin plastic sheet effectively cuts off the flow of room air through the fabric.
( ( The ( thin ( plastic sheet ) ) ) ( effectively ( ( ( ( cuts off ) ( ( the flow ) ( of ( room air ) ) ) ) ( through ( the fabric ) ) ) . ) ) )
(ROOT (S (NP (DT The) (JJ thin) (JJ plastic) (NN sheet)) (ADVP (RB effectively)) (VP (VBZ cuts) (PRT (RP off)) (NP (NP (DT the) (NN flow)) (PP (IN of) (NP (NN room) (NN air)))) (PP (IN through) (NP (DT the) (NN fabric)))) (. .)))
To cut off air in the room from the cloth, a thin sheet of plastic is used.
( ( To ( ( ( cut off ) ( air ( in ( the room ) ) ) ) ( from ( the cloth ) ) ) ) ( , ( ( ( a ( thin sheet ) ) ( of plastic ) ) ( ( is used ) . ) ) ) )
(ROOT (S (S (VP (TO To) (VP (VB cut) (PRT (RP off)) (NP (NP (NN air)) (PP (IN in) (NP (DT the) (NN room)))) (PP (IN from) (NP (DT the) (NN cloth)))))) (, ,) (NP (NP (DT a) (JJ thin) (NN sheet)) (PP (IN of) (NP (NN plastic)))) (VP (VBZ is) (VP (VBN used))) (. .)))