First, the horsemen brought out a teaser horse.
( First ( , ( ( the horsemen ) ( ( ( brought out ) ( a ( teaser horse ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB First)) (, ,) (NP (DT the) (NN horsemen)) (VP (VBD brought) (PRT (RP out)) (NP (DT a) (NN teaser) (NN horse))) (. .)))
The horsemen firstly brought out the horse meant for the main event.
( ( The horsemen ) ( firstly ( ( ( brought out ) ( ( the horse ) ( meant ( for ( the ( main event ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (DT The) (NN horsemen)) (ADVP (RB firstly)) (VP (VBD brought) (PRT (RP out)) (NP (NP (DT the) (NN horse)) (VP (VBN meant) (PP (IN for) (NP (DT the) (JJ main) (NN event)))))) (. .)))