Problem: Does "The eastern half of the state, especially the Tidewater region, developed a slave society based on a plantation system and slave labor." answer the question "Where did free black people migrate to because of the looser social system?" OPTIONS:
- yes
- no

A: no

Problem: Does "Examples include CD copy-protection schemes, and mobile phones, such as phones from Sony Ericsson and Nokia, which play AAC files rather than WMA." answer the question "What two companies use the AAC format for music files?" OPTIONS:
- yes
- no

A: yes

Problem: Does "In all, 67.8% of Estonia's population can speak Russian." answer the question "How much of Estonia is ethnic Russians?" OPTIONS:
- yes
- no

A:
no