. "300748359"@en-us . "300748359"^^ . . . . . . "serious"^^ . "requiring effort or concentration; complex and not easy to answer or solve; \"raised serious objections to the proposal\"; \"the plan has a serious flaw\""@en-us . "0"^^ . "300717541"@en-us . . "inter"^^ . "inter"^^ . "300713571"@en-us . . "serious"@en-us . . "0.75"^^ . "00748359-a"^^ .