( ( Heterogeneous ( mixtures ( have ( a composition ) ) ) ) that )
(ROOT (SINV (VP (VBZ Heterogeneous) (SBAR (S (NP (NNS mixtures)) (VP (VBP have) (NP (DT a) (NN composition)))))) (NP (DT that))))
Heterogeneous mixtures have a composition that
(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)))))))))) (. .)))