Simplify the following text for a Grade 4 native English-speaking person.
Original: Pistoia is a city and comune in the Tuscany region of Italy , the capital of a province of the same name , located about 30 km west and north of Florence and is crossed by the Ombrone Pistoiese , a tributary of the River Arno .
Simplified: It is the capital of the province of Pistoia . The city is located about 30 km west and north of Florence .