Does the sentence "Derby's ministry did not last long, and in June 1859 Victoria recalled Palmerston to office." provide a valid answer to the question "What happened in June 1859?"

A: yes

Does the sentence "A treaty will be invalidated due to either the circumstances by which a state party joined the treaty, or due to the content of the treaty itself." provide a valid answer to the question "Which articles of the Vienna Convention on the Law of Treaties set out the ways that treaties can be invalidated?"

A: no

Does the sentence "A major setback to the event was caused by footballer Diego Maradona, scheduled to open the relay through Buenos Aires, pulling out in an attempt to avoid the Olympic controversy." provide a valid answer to the question "What was tossed at the torch trying to put it out?"

A: no

Does the sentence "As the Grand Duchy of Finland was part of the Russian Empire from 1809 to 1918, a number of Russian speakers have remained in Finland." provide a valid answer to the question "When did Finland join the Russian Empire?"

A:
yes