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