( ( This condition ) ( ( is ( specified ( by ( a ( yield function ) ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN condition)) (VP (VBZ is) (VP (VBN specified) (PP (IN by) (NP (DT a) (NN yield) (NN function))))) (. .)))
This condition is specified by a yield function .
(ROOT (S (NP (NP (DT The) (NN amount)) (PP (IN of) (NP (NP (NN product)) (SBAR (WHNP (WDT that)) (S (VP (MD may) (VP (VB be) (VP (VBN produced) (PP (IN by) (NP (DT a) (NN reaction))) (PP (IN under) (NP (VBN specified) (NNS conditions))))))))))) (VP (VBZ is) (VP (VBN called) (NP (JJ theoretical) (NN yield)))) (. .)))
The amount of product that may be produced by a reaction under specified conditions is called theoretical yield.