The cat needs the mouse. The mouse needs the cat. If something is young then it sees the mouse. If something needs the mouse and it needs the cat then it eats the mouse. If something sees the mouse then it needs the mouse. If something sees the cat and the cat is blue then it sees the mouse. If something is round then it is big. If something sees the cat then it eats the cat. If something eats the cat and the cat needs the mouse then the cat is round. If something needs the mouse then the mouse sees the cat.
The mouse sees the cat.