earth mammal, earth dog, earth cat, earth horse, earth naysayer, earth bird { blood: warm; }

earth mammal, earth dog, earth cat, earth horse, earth naysayer { produces-milk: true; }

dog { says: "Woof!"; }

cat { says: "Meow."; }

horse, naysayer { says: "Nay."; }

[hey], ho { a: b; }

ho { c: d; }

fancy outer space vehicle, fancy outer space new american mars rover, new american mars fancy outer space rover { insides: advanced; }

new american mars rover { wheels: big; }

foo, a b c { something: whatever; }

a b c { blah: blah; }

d e f, d e g { blah: blah; }

g { bloo: bloo; }