Can Mark run?
Yes, he can.
Can Sarah swim?
Yes, she can.
Can Sarah play football?
No, she can't.
Can Sarah ride a bike?
Yes, she can.
Can George play football?
Yes, he can.
Can George swim?
No, he can't.
Can Mark play football?
Yes, he can.
Can George ride a bike?
No, he can't.
Can George run?
Yes, he can.
Can Mark ride a bike?
No, he can't.
Can Mark swim?
No, he can't.