A group of parents are sitting at an outdoor assembly .
There are parents who are sitting at an outdoor assembly .
A group of parents are sitting at an outdoor assembly.
There are parents who are sitting at an outdoor assembly.
Whether these people are parents is unknown; perhaps none of them have any children of their own and have never desired to procreate.
Whether these people are parents is unknown ; perhaps none of them have any children of their own and have never desired to procreate .