. "1978-01-01Z"^^ . "1899-02-18Z"^^ . "Sir Gilbert Roberts"@en . "Sir Gilbert Roberts (18 February 1899 - 1 January 1978) was a British civil engineer."@en . "1899Z"^^ . "Gilbert Roberts"@en . . . "1978Z"^^ . "Roberts, Gilbert"@en . "British engineer" . .