Problem: Does "But it was mostly chosen as the color for stoplights and stop signs because of its universal association with danger and warning." answer the question "At what time is red at its brightest?"

A: no

Problem: Does "By 1213, though, John was increasingly worried about the threat of French invasion." answer the question "What threat was John worried about?"

A: yes

Problem: Does "It had been used in 1957 to reintegrate the Saar Protectorate as the Saarland into the Federal Republic, and this was used as a model for German reunification in 1990." answer the question "Which state was Article 23 used to reintegrate?"

A:
yes