The girl in a purple sweater performs on her guitar and passersby stop to listen .
A girl in a purple sweater is playing guitar .
The girl in a purple sweater performs on her guitar and passersby stop to listen.
A girl in a purple sweater is playing guitar.
A girl in a purple sweater is playing a guitar if she performs her guitar.
A girl in a purple sweater is playing a guitar if she performs her guitar .