Question: How many passengers were on the flight that the Russian Union of Engineers published a paper on?
Sentence (from "Russian Union of Engineers"): The Russian Union of Engineers (RUE) (Russian: Российский союз инженеров (РСИ)) claims to be an all-Russian nongovernmental organization of engineers, design-engineers, builders, inventors, rationalizers, researchers, scientists, scientific and technical employees, and managers of industrial production.
Relevant evidence: No