Does "Bulgaria was also free but was de jure vassal to the Ottoman Empire until official independence was declared in 1908." contain the correct answer to "Whose official independence was declared in 1908?"

A: yes

Does "Northern hardwood forests are especially negatively impacted by invasive worms through the loss of leaf duff, soil fertility, changes in soil chemistry and the loss of ecological diversity." contain the correct answer to "Where did most of the current earthworms in glacial areas come from?"

A: no

Does "In February 2015, YouTube announced the launch of a new app specifically for use by children visiting the site, called YouTube Kids." contain the correct answer to "What did youtube announce in Feb of 2015?"

A:
yes