Q: "People are admiring a work of art." Does this mean that "People were in an art gallery."?
A: yes

Q: "A girl is sitting under a tree, and another person is going by riding a bicycle in the street." Does this mean that "person on bike"?
A: yes

Q: "The young flower girl carefully carries her basket of flower petals." Does this mean that "The girl is old"?
A: no

Q: "Two men riding horses, one on either side of a cow, in a rodeo competition." Does this mean that "Two men guide a cow to its starting point for the rodeo's next event."?
A:
it is not possible to tell