Possible Clues:

• What Horton heard
• Dr. Seuss's 'Horton Hears ___'
• 'Horton Hears ___'
• Dr. Seuss's "Horton Hears __"
• ''Horton Hears __!''
• 'Horton Hears --!'
• "Horton Hears __"
• "Horton Hears ___!"
• "Horton Hears —!"
• 'Horton Hears !'