Complex sentence: The Tiškevičiai Palace's park was converted into a botanical garden in 1960 and today it has two hundred different types of trees and shrubs, including an oak tree planted by President Antanas Smetona.
Split into simpler sentences: The Tiškevičiai Palace's park was converted into a botanical garden in 1960. Today it contains two hundred different types of trees and shrubs, including an oak tree planted by President Antanas Smetona.