Does the sentence "After Kim Jong Il, the second ruler of North Korea, died in December 2011, Kim Jong Un stepped up and began mandating the use of Hanja as a source of definition for the Korean language." provide a valid answer to the question "Who began moderating the use of Hanja?"

A: yes

Does the sentence "Catalan pronouns exhibit TV distinction, like all other Romance languages (and most European languages, but not Modern English)." provide a valid answer to the question "What modern language does not have a T-Y distinction?"

A: yes

Does the sentence "The Russo-Turkish War (187778) ended with a decisive victory for Russia." provide a valid answer to the question "Bulgaria became independent within the Empire as the result of what war?"

A: yes

Does the sentence "Further problems hampered the Arctic project after the commencement of drilling in 2012, as Shell dealt with a series of issues that involved air permits, Coast Guard certification of a marine vessel and severe damage to essential oil-spill equipment." provide a valid answer to the question "What worsened the situation at the end of 2012?"

A:
no