Text: The only Michelangelo in the Uffizi is the Holy Family or Doni Tondo (1504), his only known panel painting (he was far better known for his frescoes and sculpture), decidedly sculptural in quality.
Entailment: Michelangelo was best known for his frescoes and sculpture work.
Contradiction: Michelangelo has no work available to view in the Uffizi.