Problem: Does "According to Mammal Species of the World, 5,416 species were known in 2006." answer the question "How many mammals were known to exist up to 2006?"

A: yes

Problem: Does "To facilitate the transfer of cargo from the flat-bottomed bateaux above the fall line to the ocean-faring ships below, George Washington helped design the James River and Kanawha Canal in the 18th century to bypass Richmond's rapids, with the intent of providing a water route across the Appalachians to the Kanawha River." answer the question "What man-made body of water was designed in part by George Washington?"

A: yes

Problem: Does "Nicholas believed that the European powers, especially Austria, would not object strongly to the annexation of a few neighbouring Ottoman provinces, especially considering that Russia had assisted Austria's efforts in suppressing the Hungarian Revolution in 1849." answer the question "Who recognized and gave Russia the special guardian role?"

A:
no