The relatively small crowds mean that fans sit close to the action.
( ( The ( ( relatively small ) crowds ) ) ( ( mean ( that ( fans ( sit ( close ( to ( the action ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (ADJP (RB relatively) (JJ small)) (NNS crowds)) (VP (VBP mean) (SBAR (IN that) (S (NP (NNS fans)) (VP (VBP sit) (ADJP (JJ close) (PP (TO to) (NP (DT the) (NN action)))))))) (. .)))
Fans sit close to the action, because we can see relatively small crowds, said the TV presenter.
( ( Fans ( ( ( sit ( close ( to ( the action ) ) ) ) , ) ( because ( we ( can ( see ( ( relatively small ) crowds ) ) ) ) ) ) ) ( , ( ( said ( the ( TV presenter ) ) ) . ) ) )
(ROOT (SINV (S (NP (NNS Fans)) (VP (VBP sit) (ADJP (JJ close) (PP (TO to) (NP (DT the) (NN action)))) (, ,) (SBAR (IN because) (S (NP (PRP we)) (VP (MD can) (VP (VB see) (NP (ADJP (RB relatively) (JJ small)) (NNS crowds)))))))) (, ,) (VP (VBD said)) (NP (DT the) (NNP TV) (NN presenter)) (. .)))