Complex sentence: His grandfather, Pandit Shyam Lal Vajpayee, had migrated to Gwalior from his ancestral village of Bateshwar, Uttar Pradesh and his father, Krishna Bihari Vajpayee, was a poet and a schoolmaster in his hometown.
Split into simpler sentences: His grandfather, Pandit Shyam Lal Vajpayee, had migrated to Gwalior from his ancestral village of Bateshwar, Uttar Pradesh. His father, Krishna Bihari Vajpayee, was a poet and a schoolmaster in his hometown.