For the present structure, we must be grateful to the great restorer-architect Eugyne Viollet-le-Duc, who did extensive renovations from 1845 to 1863 in response to the public outcry started by Victor Hugo's novel, Notre-Dame de Paris.
We should be grateful to the restorer-architect who did renovations on the present structure in the past.
mnli hypothesis: We should be grateful to the restorer-architect who did renovations on the present structure in the past. premise: For the present structure, we must be grateful to the great restorer-architect Eugyne Viollet-le-Duc, who did extensive renovations from 1845 to 1863 in response to the public outcry started by Victor Hugo's novel, Notre-Dame de Paris.