Problem: Does "The Sierra Madre Occidental mountain range, an extension of the Rocky Mountains, dominates the state's terrain and is home to the state's greatest attraction, Las Barrancas del Cobre, or Copper Canyon, a canyon system larger and deeper than the Grand Canyon." answer the question "The Copper Canyon is deeper than what popular American canyon?"

A: yes

Problem: Does "Investment banks on Wall Street answered this demand with products such as the mortgage-backed security and the collateralized debt obligation that were assigned safe ratings by the credit rating agencies." answer the question "What is one investment assigned safe ratings by the credit rating agencies?"

A: yes

Problem: Does "It is done in late August or early September." answer the question "During what time of year is the Umhlanga Reed Dance?"

A:
yes