Q: Does "Contact with European diseases such as smallpox and measles killed between 50 and 67 per cent of the Aboriginal population of North America in the first hundred years after the arrival of Europeans." provide a valid answer to "What percent of the Aboriginal population of North America was killed in the first hundred years after first contact by smallpox and measles?"?
OPTIONS:
- yes
- no
A: yes

Q: Does "The photophone was a precursor to the fiber-optic communication systems which achieved popular worldwide usage in the 1980s." provide a valid answer to "In what decade did fiber-optics become widely used?"?
OPTIONS:
- yes
- no
A: yes

Q: Does "Only browsers that supported HTML5 Video using the H.264 or WebM formats could play the videos, and not all videos on the site were available." provide a valid answer to "What format besides H.264 was playable with HTML5?"?
OPTIONS:
- yes
- no
A: yes

Q: Does "Today, nearly all commonly used video compression methods (e.g., those in standards approved by the ITU-T or ISO) apply a discrete cosine transform (DCT) for spatial redundancy reduction." provide a valid answer to "What do all commonly used video compression methods use?"?
OPTIONS:
- yes
- no
A:
yes