Simplify the following text for a Grade 9 native English-speaking person.
Original: Young Poland is a modernist period in Polish visual arts , literature and music , covering roughly the years between 1890 and 1918 .
Simplified: Young Poland ( in Polish : MÅ oda Polska ) is a period modernist of Polish art , literature and music . This period covered about the years since 1890 until 1918 .