Note that the I/S standard deviations control for differences in firm size.
( ( Note ( that ( ( the ( I/S ( standard deviations ) ) ) ( control ( for ( differences ( in ( firm size ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (NN Note) (SBAR (IN that) (S (NP (DT the) (NNP I/S) (JJ standard) (NNS deviations)) (VP (VBP control) (PP (IN for) (NP (NP (NNS differences)) (PP (IN in) (NP (NN firm) (NN size))))))))) (. .)))
I/S is out of control when there are differences in firm size.
( I/S ( ( ( is ( out ( of control ) ) ) ( when ( there ( are ( differences ( in ( firm size ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP I/S)) (VP (VBZ is) (ADJP (IN out) (PP (IN of) (NP (NN control)))) (SBAR (WHADVP (WRB when)) (S (NP (EX there)) (VP (VBP are) (NP (NP (NNS differences)) (PP (IN in) (NP (NN firm) (NN size)))))))) (. .)))