In fact, a production line is probably never in perfect balance.
( ( In fact ) ( , ( ( a ( production line ) ) ( ( ( ( is probably ) never ) ( in ( perfect balance ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NN fact))) (, ,) (NP (DT a) (NN production) (NN line)) (VP (VBZ is) (ADVP (RB probably)) (ADVP (RB never)) (PP (IN in) (NP (JJ perfect) (NN balance)))) (. .)))
It is a probable fact that a production line is never in perfect balance.
( It ( ( ( is ( a ( probable fact ) ) ) ( that ( ( a ( production line ) ) ( ( is never ) ( in ( perfect balance ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (NP (DT a) (JJ probable) (NN fact)) (SBAR (IN that) (S (NP (DT a) (NN production) (NN line)) (VP (VBZ is) (ADVP (RB never)) (PP (IN in) (NP (JJ perfect) (NN balance))))))) (. .)))