"0"^^ . "01516609-n"^^ . . "0"^^ . . "101039660"@en-us . . . "Sinornis"^^ . "Sinornis"@en-us . . "101439012"@en-us . . "sparrow-sized fossil bird of the Jurassic period to the Cretaceous period having a keeled breastbone and vestigial tail; found in China; considered possibly the second most primitive of all birds"@en-us . . . . . "101516609"^^ .