The phrase "a demonstration of about" is not correct and does not convey a clear meaning in written English.
It may be intended to express an approximate demonstration of something, but the wording is awkward and unclear.
Example: "The presentation was a demonstration of about how the new software can improve efficiency."
Alternatives: "a demonstration of approximately" or "a demonstration of roughly".
On Oct. 1, 1979 — National Day — Mr. Wang led a demonstration of about 1,000 protesters that ended up with a speakers' platform on the steps of the Beijing municipal party committee building.
A demonstration of about 3,000 people -- that Mr. Arafat had pledged to American security officials would be restrained -- had reached the perimeters of Mr. Arafat's building as General Powell was whisked away in a heavily armored van.
That was the contradictory message sent out on July 18th when three men were each jailed for six years and one man for four years for their role in a heated protest outside the Danish embassy in London last year.The men, all Muslims, had taken part in a demonstration of about 300 people following the publication in a Danish newspaper of cartoons making fun of the Prophet and of Muslims generally.
It was followed by a demonstration of about 200 people the following day who were angry at the council's actions.
On 15 April, a demonstration of about 30 people at the National Assembly, where talks on a transition government were ongoing, was dispersed by soldiers.
Four days before Cerezo's inauguration, the organization held a demonstration of about 1,000 people in front of the National Palace, for the first time yelling "Assassins, assassins!" at military officials and police officers nearby.
At about midnight Thursday, a "victory demonstration" of about 20 people, led by police cars with their sirens wailing, pulled up in front of the Grand Hotel, where foreign journalists are staying.
So its very appropriate as a demonstration of being confused about conclusions.
By his announcement on Thursday, Judge Hittner signaled that his earlier decision was not intended to block Mrs. Fastow from changing her plea but rather was a demonstration of deep concern about the proposed sentence.
The show is really a demonstration of deduction, yet nothing about it is abstract or arcane.
From the back of the store comes an announcement that a demonstration of OS X is about to begin.
