Problem: Does "Von Neumann raised the intellectual and mathematical level of economics in several stunning publications." answer the question "What did von Neumann prove with his model of expanding economy?"

A: no

Problem: Does "In Central Catalan, unstressed vowels reduce to three: /a" answer the question "Where do unstressed vowels reduce to three?"

A: yes

Problem: Does "In January 1977, two dissenting students and a number of army officers were publicly hanged; Amnesty International condemned it as the first time in Gaddafist Libya that dissenters had been executed for purely political crimes." answer the question "How many students were executed in January of 1977?"

A:
yes