question: going abroad:passport:visa
choices.label: A B C D
choices.text: entrance to schools:admission:grades meeting:time:place taking high-speed rail:id card:ticket group tour:travel agency:air ticket
explanation: "going abroad" must apply for a "passport" and a "visa", and to apply for a "visa", one must have a "passport". "admission" depends on the level of "grade". "meeting" can only be "held" after "time" and "location" are selected. "location" is not a necessary condition for "time". to "take the high-speed rail", you must have an "id card" and a "ticket", and you must use an "id card" to buy a "ticket". a "travel agency" is not a requirement for a "air ticket".
relation: going abroad passport R5.4
relation: taking high-speed rail id card R5.4