Simplify the following text for a Grade 10 native English-speaking person.
Original: The Parliament , informally referred to as `` Holyrood '' , is a democratically elected body comprising 129 members known as Members of the Scottish Parliament ( MSPs ) .
Simplified: The Parliament , informally referred to as `` Holyrood '' ( cf . `` Westminster '' ) , is a democratically elected body of 129 members known as Members of the Scottish Parliament ( MSPs ) .