Problem: Does "In practice, this has been interpreted as meaning that the executive branch is free to negotiate and sign a treaty, but its ratification by the president is contingent upon the prior approval of Congress." answer the question "In order for a treaty to be valid in Brazil, a presidential decree incorporating the treaty into domestic law must be published where in order to be valid?"

A: no

Problem: Does "Plant circadian rhythms tell the plant what season it is and when to flower for the best chance of attracting pollinators." answer the question "What do plants need to attract to their flowering?"

A: yes

Problem: Does "19:26-27] has in itself been the subject of Marian art, and well known Catholic symbolism such as the Miraculous Medal and Pope John Paul II's Coat of Arms bearing a Marian Cross." answer the question "What symbol is popular in Marian Art?"

A:
yes