Classifier Instance:

Anchor text: Canada
Target Entity: Canada
Preceding Context: The aneroid altimeter is calibrated to show the pressure directly as an altitude above mean sea level, in accordance with a mathematical model defined by the International Standard Atmosphere (ISA). Older aircraft used a simple where the needle made less than one revolution around the face from zero to full scale. This design evolved to the drum-type altimeter, where each revolution of a single needle accounted for 1,000 feet, and with thousand foot increments recorded on a numerical odometer-type drum. To determine altitude, a pilot first had to read the drum to get the thousands of feet, then look at the needle for the hundreds of feet. Modern aircraft use a "sensitive altimeter," which has a primary needle, and one or more secondary needles that show the number of revolutions, similar to a clock face. In other words, each needle points to a different digit of the current altitude measurement. On a sensitive altimeter, the sea level reference pressure can be adjusted by a setting knob. The reference pressure, in inches of mercury in
Succeeding Context: and the US and hectopascals (previously millibars) elsewhere, is displayed in the small Kollsman window, on the face of the aircraft altimeter. This is necessary, since sea level reference atmospheric pressure at a given location varies over time with temperature and the movement of pressure systems in the atmosphere.
Paragraph Title: Use in aircraft
Source Page: Altimeter

Ground Truth Types:

Predicted Types:

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