Problem: Text: The return address is not required on postal mail. However, lack of a return address prevents the postal service from being able to return the item if it proves undeliverable; such as from damage, postage due, or invalid destination. Such mail may otherwise become dead letter mail.

Question: will the post office deliver a letter without return address?

OPTIONS:
- no
- yes
A: yes

Problem: Text: A Pacific hurricane is a mature tropical cyclone that develops within the eastern and central Pacific Ocean to the east of 180W, north of the equator. For tropical cyclone warning purposes, the northern Pacific is divided into three regions: the eastern (North America to 140W), central (140W to 180), and western (180 to 100E), while the southern Pacific is divided into 2 sections, the Australian region (90E to 160E) and the southern Pacific basin between 160E and 120W. Identical phenomena in the western north Pacific are called typhoons. This separation between the two basins has a practical convenience, however, as tropical cyclones rarely form in the central north Pacific due to high vertical wind shear, and few cross the dateline.

Question: can there be a hurricane in the pacific ocean?

OPTIONS:
- no
- yes
A: yes

Problem: Text: In music, a double stop refers to the technique of playing two notes simultaneously on a bowed stringed instrument such as a violin, a viola, a cello, or a double bass. In performing a double stop, two separate strings are bowed or plucked simultaneously. Although the term itself suggests these strings are to be fingered (stopped), in practice one or both strings may be open.

Question: can a violin play two notes at once?

OPTIONS:
- no
- yes
A:
yes