Does the sentence "With an economy larger than all the Balkan economies combined, Greece is the largest economy in the Balkans, and an important regional investor." provide a valid answer to the question "Greece's economy is what size?" OPTIONS:
- yes
- no

A: yes

Does the sentence "Despite this, ducks did not appear in agricultural texts in Western Europe until about 810 AD, when they began to be mentioned alongside geese, chickens, and peafowl as being used for rental payments made by tenants to landowners." provide a valid answer to the question "Where ducks ever used as a type of commerence in the world?" OPTIONS:
- yes
- no

A: yes

Does the sentence "Typical use of the various technologies described above include calling or conferencing on a one-on-one, one-to-many or many-to-many basis for personal, business, educational, deaf Video Relay Service and tele-medical, diagnostic and rehabilitative use or services." provide a valid answer to the question "What is one way that videocalling can be used?" OPTIONS:
- yes
- no

A: no

Does the sentence "The water absorption of aluminium and palladium becomes an unacceptable source of outgassing, and even the adsorptivity of hard metals such as stainless steel or titanium must be considered." provide a valid answer to the question "What are 2 metals that can be absorbed in an ultra high vacuum system?" OPTIONS:
- yes
- no

A:
yes