( ( A ( double bond ) ) ( ( can ( be ( ( changed ( to ( ( ( ( a ( single bond ) ) , ) e.g. ) , ) ) ) ( ( ( changing ( a ( 2-polyunsaturated ( fatty acid ) ) ) ) ( into ( ( ( a ( monounsaturated ( fatty acid ) ) ) or ) ( a ( monounsaturated ( fatty acid ) ) ) ) ) ) ( into ( a ( saturated ( fatty acid ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (JJ double) (NN bond)) (VP (MD can) (VP (VB be) (VP (VBN changed) (PP (TO to) (NP (NP (DT a) (JJ single) (NN bond)) (, ,) (NP (NNP e.g.)) (, ,))) (S (VP (VBG changing) (NP (DT a) (JJ 2-polyunsaturated) (NN fatty) (NN acid)) (PP (IN into) (NP (NP (DT a) (JJ monounsaturated) (NN fatty) (NN acid)) (CC or) (NP (DT a) (JJ monounsaturated) (NN fatty) (NN acid)))) (PP (IN into) (NP (DT a) (JJ saturated) (NN fatty) (NN acid)))))))) (. .)))
A double bond can be changed to a single bond, e.g., changing a 2-polyunsaturated fatty acid into a monounsaturated fatty acid or a monounsaturated fatty acid into a saturated fatty acid.
(ROOT (S (NP (JJ Single) (NNS bonds)) (VP (VBP are) (ADVP (RB there)) (PP (IN between) (NP (NP (NN carbon) (NNS atoms)) (PP (IN in) (NP (JJ saturated) (NN fatty) (NNS acids)))))) (. .)))