Does the sentence "Although the work was shown in the Salon de la Section d'Or in October 1912 and the 1913 Armory Show in New York, Duchamp never forgave his brothers and former colleagues for censoring his work." provide a valid answer to the question "Was Duchamp's work considered controversial when displayed in 1912?"

A: no

Does the sentence "Subsequently, Khomeini accepted a truce mediated by the UN." provide a valid answer to the question "Who mediated the truce which ended the Iran-Iraq War?"

A: yes

Does the sentence "Despite the fact that various warlords gained control of the government in Beijing during the warlord era, this did not constitute a new era of control or governance, because other warlords did not acknowledge the transitory governments in this period and were a law unto themselves." provide a valid answer to the question "Why was there not a new era of governance in Beijing?"

A: yes

Does the sentence "Rocco and Madonna suffered complications from the birth due to her experiencing placenta praevia." provide a valid answer to the question "What type of birth complications did Madonna suffer at birth?"

A:
yes