(S (S (BASENP (DT The) (NN report)) (VP (VBD said) (SBAR (IN that) (S (NP (BASENP (DT a) (NN calorie)) (PP (IN of) (BASENP (NN food)))) (VP (VP (VP (VBD took) (NP (BASENP (QP (RB roughly) (NN 1)) (NN litre)) (PP (IN of) (BASENP (NN water))))) (S (VP (TO to) (VP (VB produce))))) (COMMA ,) (PP (IN with) (S (NP (BASENP (DT a) (NN kilo)) (PP (IN of) (BASENP (NN grain)))) (VP (VP (VBG needing) (BASENP (QP (RB only) (NN 500-4) (NN ,000)) (NNS litres))) (PP (VBN compared) (PP (TO to) (NP (NP (BASENP (DT a) (NN kilo)) (PP (IN of) (BASENP (ADJP (RB industrially) (VBN produced)) (NN meat)))) (VP (VBG taking) (BASENP (NN 10,000) (NNS litres)))))))))))))) (PERIOD .))