Q: Does "Thorium oxide gives glass a high refractive index and low dispersion and was formerly used in producing high-quality lenses, but due to its radioactivity has been replaced by lanthanum oxide in modern eyeglasses.[citation needed]" provide a valid answer to "What property of thorium oxide has caused it to no longer be used in eyeglasses?"?
A: yes

Q: Does "" As often happens in countries undergoing social crisis, the aspirations of the Muslim world's translators and modernizers, such as Muhammad Abduh, largely had to yield to retrograde currents." provide a valid answer to "What was the dividing up of the Middle Eastern countries in violation of?"?
A: no

Q: Does "23rd Street is another main numbered street in Manhattan." provide a valid answer to "Where does 23rd Street end?"?
A: no

Q: Does "The civil rights guarantees came through the interpretation of the Equal Protection Clause of the 14th Amendment." provide a valid answer to "Which part of the constitution was the basis for policies that were developed during the Civil Rights Movement?"?
A:
yes