Problem: Arsenal F.C.:

In 1949, the club unveiled a modernised crest featuring the same style of cannon below the club's name, set in blackletter, and above the coat of arms of the Metropolitan Borough of Islington and a scroll inscribed with the club's newly adopted Latin motto, Victoria Concordia Crescit "victory comes from harmony", coined by the club's programme editor Harry Homer. For the first time, the crest was rendered in colour, which varied slightly over the crest's lifespan, finally becoming red, gold and green. Because of the numerous revisions of the crest, Arsenal were unable to copyright it. Although the club had managed to register the crest as a trademark, and had fought (and eventually won) a long legal battle with a local street trader who sold "unofficial" Arsenal merchandise, Arsenal eventually sought a more comprehensive legal protection. Therefore, in 2002 they introduced a new crest featuring more modern curved lines and a simplified style, which was copyrightable. The cannon once again faces east and the club's name is written in a sans-serif typeface above the cannon. Green was replaced by dark blue. The new crest was criticised by some supporters; the Arsenal Independent Supporters' Association claimed that the club had ignored much of Arsenal's history and tradition with such a radical modern design, and that fans had not been properly consulted on the issue.

What legal stance did Arsenal use to win a law suit against a merchant?
---
A: trademark

Problem: Gramophone record:

In 1926 Joseph P. Maxwell and Henry C. Harrison from Bell Telephone Laboratories disclosed that the recording pattern of the Western Electric "rubber line" magnetic disc cutter had a constant velocity characteristic. This meant that as frequency increased in the treble, recording amplitude decreased. Conversely, in the bass as frequency decreased, recording amplitude increased. Therefore, it was necessary to attenuate the bass frequencies below about 250 Hz, the bass turnover point, in the amplified microphone signal fed to the recording head. Otherwise, bass modulation became excessive and overcutting took place into the next record groove. When played back electrically with a magnetic pickup having a smooth response in the bass region, a complementary boost in amplitude at the bass turnover point was necessary. G. H. Miller in 1934 reported that when complementary boost at the turnover point was used in radio broadcasts of records, the reproduction was more realistic and many of the musical instruments stood out in their true form.

What is found when a complementary boost is used at the bass turnover point?
---
A: reproduction was more realistic

Problem: Solar energy:

A solar balloon is a black balloon that is filled with ordinary air. As sunlight shines on the balloon, the air inside is heated and expands causing an upward buoyancy force, much like an artificially heated hot air balloon. Some solar balloons are large enough for human flight, but usage is generally limited to the toy market as the surface-area to payload-weight ratio is relatively high.

What is a solar balloon?
---
A: a black balloon that is filled with ordinary air

Problem: Web browser:

Web browsers consist of a user interface, layout engine, rendering engine, JavaScript interpreter, UI backend, networking component and data persistence component. These components achieve different functionalities of a web browser and together provide all capabilities of a web browser.

What parts of a layout engine make up a data persistence component?
---
A:
unanswerable