Q: "Two young women run down the sidewalk at night." Does this mean that "Two young men run down the sidewalk at night."?
A: no

Q: "A group of girls in red gowns are in the middle of a musical performance." Does this mean that "Three girls are wearing red ball gowns in the senior class play."?
A: it is not possible to tell

Q: "A woman is wearing a horse costume and helmet at an outdoor barbecue." Does this mean that "A female is at a party."?
A: it is not possible to tell

Q: "A man plays his guitar in a dimly lit room." Does this mean that "A man is playing his guitar"?
A:
yes