Someone riding a blue dirt bike on a dirt course.
There is a person riding a dirt bike on the dirt course.
If "Someone riding a blue dirt bike on a dirt course.", does this mean that "There is a person riding a dirt bike on the dirt course."?

Options: 

 - yes

 - it is not possible to tell

 - no
yes
If "Someone riding a blue dirt bike on a dirt course.", does this mean that "There is a person riding a dirt bike on the dirt course."?

Options: 

 - yes

 - it is not possible to tell

 - no
user
yes
assistant