Premise: On one grand boulevard, the Paseo del Prado, are three of Europe's finest  the world-class Prado museum, the Thyssen-Bornemisza collection, and the Centro de Arte Reina Sof?­a (Queen Sof?­a Art Ceter), whose claim to fame is the 20th century's most famous painting, Pablo Picasso's Guernica.

Hypothesis: All the tourism in the area is centralized to where the Prado museums are.
Relation: neutral