( ( A term ) ( ( to ( describe ( ( a ( heterogeneous mixture ) ) ( of antibodies ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN term)) (VP (TO to) (VP (VB describe) (NP (NP (DT a) (JJ heterogeneous) (NN mixture)) (PP (IN of) (NP (NNS antibodies)))))) (. .)))
A term to describe a heterogeneous mixture of antibodies.
(ROOT (S (NP (NNS Heterogeneous)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT a) (NN mixture)) (SBAR (WHNP (WDT that)) (S (VP (VBZ varies) (PP (IN in) (NP (PRP$ its) (NN composition)))))))))) (. .)))