What key details about sistar19  can be extracted from the following bio?  Bio: sistar19 -lrb- stylized as sistar19 , -rrb- is the first official sub-group of south korean girl group sistar and was formed by starship entertainment in 2011 . the sub-group is composed of hyolyn and bora .
The answer to this question is:
- years active is 2011 -- present- landscape is yes- caption is left to right : bora , hyolyn- origin is seoul , south korea- label is starship entertainment- genre is k-pop- name is sistar19- background is group_or_band- image is sistar19.jpg- associated acts is sistar starship planet