Take the following as truth: The importance of Siena's 13th- and 14th-century school of art is best illustrated in the imposing Palazzo Buonsignori's National Art Gallery (Pinacoteca Nazionale).
Then the following statement: "The National Art Gallery illustrates the importance of Siena's 13th- and 14th-century school of art." is true, false, or inconclusive?
Answer: True