Simplify the following text for a Grade 5 native English-speaking person.
Original: Lake Iseo or Lago d'Iseo or Sebino is the fourth largest lake in Lombardy , Italy , fed by the Oglio river .
Simplified: Lake Iseo or Lago d'Iseo or Sebino is the fourth largest lake in Lombardy , Italy . Water flows into it from the Oglio river .