The knife and motor are supported above the base plate by a frame.
( ( The ( ( knife and ) motor ) ) ( ( are ( ( supported ( above ( the ( base plate ) ) ) ) ( by ( a frame ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN knife) (CC and) (NN motor)) (VP (VBP are) (VP (VBN supported) (PP (IN above) (NP (DT the) (NN base) (NN plate))) (PP (IN by) (NP (DT a) (NN frame))))) (. .)))
The knife and motor are supported over the base plate for the the sewing machine.
( ( The ( ( knife and ) motor ) ) ( ( are ( supported ( over ( ( the ( base plate ) ) ( for ( the ( the ( sewing machine ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN knife) (CC and) (NN motor)) (VP (VBP are) (VP (VBN supported) (PP (IN over) (NP (NP (DT the) (NN base) (NN plate)) (PP (IN for) (NP (DT the) (DT the) (NN sewing) (NN machine))))))) (. .)))