instruction: Tell me whether these London tourist attractions are free or paid:  The National Gallery, The London Eye, Royal Academy of Arts', Tower of London, St. Dunstan in the East
response: The National Gallery - free
  The London Eye - paid
  Royal Academy of Arts' - free
  Tower of London - paid
  St. Dunstan in the East - free
  Victoria and Albert Museum - free
  Science Gallery London - free
  Barbican Conservatory - free
  Madame Tussauds London - paid
  Harry Potter Studios - paid
  London Zoo - paid