generate questions: Slavic studies began as an almost exclusively linguistic and philological enterprise. As early as 1833, Slavic languages were recognized as Indo-European.
What began as an almost exclusively linguistic and philological enterprise? {sep_token} When were Slavic languages recognized as Indo-European? {sep_token} What languages were recognized as Indo-European? {sep_token} In 1833, Slavic languages were recognized as what? {sep_token}