Based on the given context, craft a common-sense question, especially those that are LONG, INTERESTING, and COMPLEX. The goal is to write questions that are easy for humans and hard for AI machines! To create such questions, here are some suggestions: A. What may (or may not) be the plausible reason for an event? B. What may (or may not) happen before (or after, or during) an event? C. What may (or may not) be a plausible fact about someone (or something)? D. What may (or may not) happen if an event happens (or did not happen)? You can also create other types of questions. DO NOT make your question answerable without looking at the context, or question of which the correct answer can be directly extracted from the context. DO NOT ask a question that requires very specialized knowledge that is not common sense. DO NOT ask too simple or too short questions. Your question must be related to the context and answerable with common sense. Try to add more variations and complexity to the questions.

Context: But to exercise their paedo - criminal inclinations , child abusers and their business agents use the same electronic mail and the same chat rooms as our children . We must also realise that , according to INTERPOL , the international traffic of children nets yearly over 19 Billion dollars . According to surveys in Canada and USA , one child in five has been solicited to meet a potential aggressor . The facts 3,000,000 children are reported missing , abused , prostituted , tortured , raped or killed all over the world , according to UNICEF .
Why does the international traffic of children net lots of money ?