( ( ( Sunlight and ) ( a ( food source ) ) ) . )
(ROOT (NP (NP (NP (NNP Sunlight)) (CC and) (NP (DT a) (NN food) (NN source))) (. .)))
Sunlight and a food source.
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (NP (NN food) (POS 's)) (NN chemical) (NN energy)))) (ADVP (RB ultimately)) (VP (VBZ comes) (PP (IN from) (NP (NN sunlight)))) (. .)))