( Also ( , ( ( Albacore tuna ) ( ( are ( ( heterotrophs , ) ( which ( mean ( they ( ( ( ( do not ) ( produce ( their ( own food ) ) ) ) and ) ( must ( ( ingest ( other organisms ) ) ( for food ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Also)) (, ,) (NP (NNP Albacore) (NNP tuna)) (VP (VBP are) (NP (NP (NNS heterotrophs)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP mean) (SBAR (S (NP (PRP they)) (VP (VP (VBP do) (RB not) (VP (VB produce) (NP (PRP$ their) (JJ own) (NN food)))) (CC and) (VP (MD must) (VP (VB ingest) (NP (JJ other) (NNS organisms)) (PP (IN for) (NP (NN food))))))))))))) (. .)))
Also, Albacore tuna     are heterotrophs, which mean they do not produce their own food and     must ingest other organisms for food.
(ROOT (S (NP (NNS Animals)) (VP (MD can) (RB not) (VP (VB produce) (NP (PRP$ their) (JJ own) (NN food)) (S (VP (VBG making) (S (NP (PRP them)) (ADJP (JJ heterotrophs)))))))))