Problem: Context: The increased amounts of carbon dioxide (CO2) and other greenhouse gases (GHGs) are the primary causes of the human-induced component of global warming.
Greenhouse effect changes global climate.
OPTIONS:
- yes
- no
A: yes

Problem: Context: CBS newsman Harry Reasoner is returning to his Iowa hometown to get married Saturday.
CBS newsman Harry Reasoner was born in Iowa.
OPTIONS:
- yes
- no
A: yes

Problem: Context: There is a growing sense of urgency to deal with the country's social issues, and a large number of professional NGOs can meet BOVESPA's standards of transparency and accountability.
BOVESPA is an NGO.
OPTIONS:
- yes
- no
A: no

Problem: Context: The Arabic-language television network Al-Jazeera reports it has received a statement and a videotape from militants.
Al-Jazeera is an Arabic-language television network.
OPTIONS:
- yes
- no
A:
yes