Does the sentence "It had also been introduced in 2007." provide a valid answer to the question "What act was approved on April 29th, 2010?"

A: no

Does the sentence "A state's consent may be invalidated if there was an erroneous understanding of a fact or situation at the time of conclusion, which formed the "essential basis" of the state's consent." provide a valid answer to the question "What on behalf of a state cannot invalidate that state's consent to a treaty?"

A: no

Does the sentence "American University in Cairo is ranked as 360 according to QS World University Rankings and Al-Azhar University, Alexandria University and Ain Shams University fall in the 701+ range." provide a valid answer to the question "According to QS World University Rankings and Al-Azhar University, Alexandria University and Ain Shams University are all ranked where?"

A: yes

Does the sentence "Independent service is a special service mode found on most elevators." provide a valid answer to the question "At what times is Independant service best utilized?"

A:
no