You will be given a definition of a task first, then some input of the task.
In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Passage: Bertin is presented as strong, energetic and warm-hearted. His hair is grey verging on white, his fingers spread across his knees. Bertin's fingers were described in 1959 by artist Henry de Waroquier as "crab-like claws ... emerging from the tenebrous caverns that are the sleeves of his coat." The bulk of his body is compacted in a tight black jacket, black trousers and brown satin waistcoat, with a starched white shirt and cravat revealing his open neck. He wears a gold watch and a pair of glasses in his right pocket. In the view of art historian Robert Rosenblum, his "nearly ferocious presence" is accentuated by the tightly constrained space. The chair and clothes appear too small to contain him. His coiled, stubby fingers rest on his thighs, barely protruding from the sleeves of his jacket, while his neck cannot be seen above his narrow starched white collar.
The painting is composed in monochrome, muted colours; predominately blacks, greys and browns. The exceptions are the whites of his collar and sleeves, the reds in the cushion and the light reflecting on the leather of the arm-chair. In 19th-century art, vivid colour was associated with femininity and emotion; male portraiture tended towards muted shades and monochrome. Bertin leans slightly forward, boldly staring at the viewer in a manner that is both imposing and paternal. He seems engaged, and poised to speak, his body fully towards the viewer and his expression etched with certainty. Influenced by Nicolas Poussin's 1650 Self-Portrait with Allegory of Painting, Ingres minutely details the veins and wrinkles of his face. Bertin is in three-quarter profile, against a gold–brown background lit from the right. He rests on a curved-back mahogany chair, the arms of which reflect light falling from the upper left of the pictorial space.
Output:
What is the name of the person whose "nearly ferocious presence" is accentuated by a tightly constrained space?