Here is a question about this article: Antenna tuning generally refers to cancellation of any reactance seen at the antenna terminals, leaving only a resistive impedance which might or might not be exactly the desired impedance (that of the transmission line). Although an antenna may be designed to have a purely resistive feedpoint impedance (such as a dipole 97% of a half wavelength long) this might not be exactly true at the frequency that it is eventually used at. In some cases the physical length of the antenna can be "trimmed" to obtain a pure resistance. On the other hand, the addition of a series inductance or parallel capacitance can be used to cancel a residual capacitative or inductive reactance, respectively.
What is the answer to this question: What is an antenna designed to have?
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So... purely resistive feedpoint

Here is a question about this article: 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 is the answer to this question: What sort of films were produced by Red Feather?
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So... low-budget programmers

Here is a question about this article: The period between 1815 and 1871 saw a large number of revolutionary attempts and independence wars. Balkan nations began to regain independence from the Ottoman Empire. Italy unified into a nation state. The capture of Rome in 1870 ended the Papal temporal power. Rivalry in a scramble for empires spread in what is known as The Age of Empire.
What is the answer to this question: When were there many struggles for independence or overthrowing prevailing governments?
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So...
between 1815 and 1871