context: Slavic studies began as an almost exclusively linguistic and philological enterprise. As early as 1833, Slavic languages were recognized as Indo-European.
question: స్లావిక్ భాషలు ఇండో-యూరోపియన్ భాషలుగా ఎప్పుడు గుర్తించబడ్డాయి?
answers: As early as 1833