Problem: 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index and low dispersion and was formerly used in producing high-quality lenses, but due to its radioactivity has been replaced by lanthanum oxide in modern eyeglasses.[citation needed]" answer the question "What is the benefit of thorium oxide in addition to its refractive index?" OPTIONS:
- yes
- no

A: yes

Problem: Does "His other films include Close Encounters of the Third Kind, the Indiana Jones film series, and A.I. Artificial Intelligence." answer the question "What issue did Spielberg address in his movie Munich?" OPTIONS:
- yes
- no

A: no

Problem: Does "For bulbs that contain a vacuum, the darkening is uniform across the entire surface of the envelope." answer the question "What is the IEC guideline for an unacceptable level of light loss?" OPTIONS:
- yes
- no

A:
no