Task: Text Categorization
Input (English): One work of his, the colossal Saint John the Evangelist currently resides in the Duomo of Florence, but from its creation until 1588, it occupied a place in the faade of the Baptistery, a building which this artist's mentor, Lorenzo Ghiberti, had designed. Following his work on Saint John, he worked on a statue of St. Mark for the Orsanmichele church, where he would also create a statue of Saint George several years later. While working on the sculpture Habbakuk, or Zuccone, he is alleged to have repeatedly muttered "Speak, Damn you, Speak" at the marble he was working with. For ten points, identify this 15th-century artist and sculptor of the Equestrian Monument of Gattamelata and the Bronze David.  
Output (English): Fine Arts