english: But in the nine years before Drake struck oil, in 1859, at least five-sixths of that whale oil-illuminating market disappeared, thanks to fatal competitors, chiefly oil and gas made from coal, to which the whalers had not been paying attention.
non_english: Maar in de negen jaar dat Drake olie ontdekte in 1859, was minstens vijf-zesde van de olie-verlichtingsmarkt verdwenen, dankzij felle concurrentie van met name olie en gas uit steenkool, waar de walvisvaarders niet op hadden gelet.