Training tool doubt

[Jairo Sarabia]

Hello all!,

I've trained a spanish sentence detector with Training Tool
SentenceTrainerDetector function.
But when I evaluate it with EvaluatorTool and SentenceDetectorEvaluator
only returns 0.5 of precision and recall.
How can I improve precision and evaluation in general?

Thanks in advance!,

Jairo Sarabia