Input: Article: During this period, the island enjoyed increased revenues through the sale of flax, with prices peaking in 1951. However, the industry declined because of transportation costs and competition from synthetic fibres. The decision by the British Post Office to use synthetic fibres for its mailbags was a further blow, contributing to the closure of the island's flax mills in 1965.

Now answer this question: The British Post Offices decision to use what kind of fibres hurt the flax industry?

Output: synthetic fibres

Input: Article: Each trace consists of a flat, narrow part of the copper foil that remains after etching. The resistance, determined by width and thickness, of the traces must be sufficiently low for the current the conductor will carry. Power and ground traces may need to be wider than signal traces. In a multi-layer board one entire layer may be mostly solid copper to act as a ground plane for shielding and power return. For microwave circuits, transmission lines can be laid out in the form of stripline and microstrip with carefully controlled dimensions to assure a consistent impedance. In radio-frequency and fast switching circuits the inductance and capacitance of the printed circuit board conductors become significant circuit elements, usually undesired; but they can be used as a deliberate part of the circuit design, obviating the need for additional discrete components.

Now answer this question: What type of circuits use a stripline and microstrip format?

Output: microwave circuits

Input: Article: New Haven was home to one of the important early events in the burgeoning anti-slavery movement when, in 1839, the trial of mutineering Mende tribesmen being transported as slaves on the Spanish slaveship Amistad was held in New Haven's United States District Court. There is a statue of Joseph Cinque, the informal leader of the slaves, beside City Hall. See "Museums" below for more information. Abraham Lincoln delivered a speech on slavery in New Haven in 1860, shortly before he secured the Republican nomination for President.

Now answer this question: Exactly who were the slaves upon the Spanish slaveship?

Output:
Mende tribesmen