Complex sentence: His mother Katharina Guldenmann, an inn-keeper's daughter, was a healer and herbalist recovering from smallpox at four, leaving Johannes with weakened eyesight and crippled hands.
Split into simpler sentences: His mother Katharina Guldenmann, an inn-keeper's daughter, was a healer and herbalist. Johannes was recovering from smallpox at four, leaving him with weakened eyesight and crippled hands.