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<html lang="en"><head><style>q:lang(en) { quotes: "«" "»" "'" "'";}</style></head><body><p><q>This is a <q>big</q> quote.</q></p></body></html><html lang="en"><head><style>q:lang(en) { quotes: "«" "»" "'" "'";}</style></head><body><p><q>This is a <q>big</q> quote.</q></p></body></html>