You can say you are “on a lake” to mean that you are on a watercraft or raft on top of lake water.
The question and answer are below.
Given the sentence "Two children riding a yellow raft on a lake." is it true that "Two children are on a lake."?
yes

Pulling the player in red to the ground does not always mean the rugby players tackle another player for the win.
The question and answer are below.
If "Three rugby players in black strips are pulling the player in red to the ground." does that mean that "Rugby players tackle another player for the win."?
Options:
- yes
- it is not possible to tell
- no
it is not possible to tell

A Frisbee and food are different things for which to wait.
The question and answer are below.
If "A brown dog waits for the frisbee to come down before catching it." does that mean that "The dog is waiting for it's food."?
Options:
- yes
- it is not possible to tell
- no
no