Complex sentence: In 1997, Russia and India signed a ten-year agreement for further military-technical cooperation encompassed a wide range of activities, including the purchase of completed weaponry, joint development and production, and joint marketing of armaments and military technologies.
Split into simpler sentences: In 1997, Russia and India signed a ten-year agreement for further military-technical cooperation. That agreement encompassed a wide range of activities, including the purchase of completed weaponry, joint development and production, and joint marketing of armaments and military technologies.