Problem: Please answer a question about the following article about Antenna (radio):
The end result is that the resonant antenna will efficiently feed a signal into the transmission line only when the source signal's frequency is close to that of the design frequency of the antenna, or one of the resonant multiples. This makes resonant antenna designs inherently narrowband, and they are most commonly used with a single target signal. They are particularly common on radar systems, where the same antenna is used for both broadcast and reception, or for radio and television broadcasts, where the antenna is working with a single frequency. They are less commonly used for reception where multiple channels are present, in which case additional modifications are used to increase the bandwidth, or entirely different antenna designs are used.
For use with more than one channel changes are made to increase what property?
A: bandwidth
Problem: Please answer a question about the following article about Dwight D. Eisenhower:
In late 1954, Gen. J. Lawton Collins was made ambassador to "Free Vietnam" (the term South Vietnam came into use in 1955), effectively elevating the country to sovereign status. Collins' instructions were to support the leader Ngo Dinh Diem in subverting communism, by helping him to build an army and wage a military campaign. In February 1955, Eisenhower dispatched the first American soldiers to Vietnam as military advisors to Diem's army. After Diem announced the formation of the Republic of Vietnam (RVN, commonly known as South Vietnam) in October, Eisenhower immediately recognized the new state and offered military, economic, and technical assistance.
Who was the leader of South Vietnam in 1954?
A: Ngo Dinh Diem
Problem: Please answer a question about the following article about Universal Studios:
In its early years Universal released three brands of feature films — Red Feather, low-budget programmers; Bluebird, more ambitious productions; and Jewel, their prestige motion pictures. Directors included Jack Conway, John Ford, Rex Ingram, Robert Z. Leonard, George Marshall and Lois Weber, one of the few women directing films in Hollywood.:13
What motion pictures were made by Jewel?
A: prestige motion pictures
Problem: Please answer a question about the following article about Nanjing:
According to the Sixth China Census, the total population of the City of Nanjing reached 8.005 million in 2010. The statistics in 2011 estimated the total population to be 8.11 million. The birth rate was 8.86 percent and the death rate was 6.88 percent. The urban area had a population of 6.47 million people. The sex ratio of the city population was 107.31 males to 100 females.
What was Nanjing's birth rate?
A:
8.86 percent