Skateboarder grinds a concrete railing.
Someone is skateboarding
If "Skateboarder grinds a concrete railing.", can we conclude "Someone is skateboarding"?

Options: 

 - yes

 - it is not possible to tell

 - no
yes
If "Skateboarder grinds a concrete railing.", can we conclude "Someone is skateboarding"?

Options: 

 - yes

 - it is not possible to tell

 - no
user
yes
assistant