( Excretion ( in ( unicellular protist ) ) )
(ROOT (VP (VBN Excretion) (PP (IN in) (NP (NN unicellular) (NN protist)))))
Excretion in unicellular protist
(ROOT (S (NP (NNP Unicellular) (NNS eukaryotes)) (VP (VBP are) (ADJP (JJ protists)) (ADVP (RB normally))) (. .)))