, ; . , , , . , , . , . , , - .
Prolog-. , .
II. Prolog
. . , , , , . . 15.5. isa "is " (). .
A bird is a kind of animal( ).
Flying is the normal moving method of birds ( ).
An albatross is a bird ( ).
Albert is an albatross, and so is Ross ( , ).
animal
Isa
daylight
active at
-bird-
mcwing method
fly
kiwi- |