Text: Numerous niche applications exploit the intense color of MG. It is used as a biological stain for microscopic analysis of cell biology and tissue samples. In the Gimenez staining method, basic fuchsin stains bacteria red or magenta, and malachite green is used as a blue-green counterstain. Malachite green is also used in endospore staining, since it can directly stain endospores within bacterial cells; here a safranin counterstain is often used. Malachite green can also be used as a saturable absorber in dye lasers, or as a pH indicator between pH 0.2--1.8. However, this use is relatively rare. Leuco-malachite green (LMG) is used as a detection method for latent blood in forensic science. Hemoglobin catalyzes the reaction between LMG and hydrogen peroxide, converting the colorless LMG into malachite green. Therefore, the appearance of a green color indicates the presence of blood.

Question: can malachite green be used as a counterstain?
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Answer: yes

Text: Last Cab to Darwin is a 2003 Australian drama/comedy stage play written by Reg Cribb and based upon the true story of taxi driver Max Bell who was diagnosed with terminal stomach cancer in the early 1990s. The 2003 production was presented both at the Sydney Opera House and the Octagon Theatre in Perth.

Question: is the last cab to darwin a true story?
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Answer: yes

Text: The typical grades awarded for participation in a course are (from highest to lowest) A, B, C, D, and F. Variations on the traditional five-grade system allow for awarding A+, A, A- ; B+, B, & B-; C+, C, & C-; D+, D, & D-; and F. In primary and secondary schools, a D is usually the lowest passing grade, however, there are some schools that consider a C the lowest passing grade, so the general standard is that anything below a 60 or 70 is failing, depending on the grading scale. In college and universities, a D is considered to be an unsatisfactory passing grade. Students will usually still earn credit for the class if they get a D, but sometimes a C or better is required to count some major classes toward a degree, and sometimes a C or better is required to satisfy a prerequisite requirement for a class.

Question: is a d+ a passing grade in middle school?
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Answer: yes

Text: In older generation diesel-engine vehicles, unlike in a gasoline-engine vehicle, for a 'cold start' the operator did not simply turn the key to the ''start'' position and have the engine immediately start. Instead, the operator activated the glow plug(s) for a time first. Early diesels used the 'Thermostart' type glowplug in the inlet manifold. These take 20 seconds to achieve working temperature and the vehicle operator had to manually time (or guess) when the 20 seconds had elapsed. With in-cylinder glow plugs, technological improvements included a warning light on the dash to indicate how long the preheating should last. The preheating phase was also made to be automatically activated when the operator turned the key to the ''on'' position for a long duration; the glowplug relay switches the glowplugs on, and a light (see picture at right) on the instrument cluster illuminates. This process is called ''pre-heating'' or ''glowing''. Many modern diesels automatically activate their glow plugs when the operator unlocks the vehicle or opens the door to the car, thus simplifying the process and shortening the time the operator has to wait before the engine will start. According to Bosch: ''Older engines with Thermostart manifold plugs used a glow period of up to 20 seconds whereas more modern engines use around a 6 to 8 second heat period and provide after glow at a reduced voltage.''

Question: do glow plugs stay on all the time?
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Answer:
no