A head may pertain-to a (travel office).Logical formLearned from23 sentences. Travels can be over.Logical formLearned from23 sentences. Travel can be on trains.Logical formLearned from23 sentences. Segments may pertain-to a (travel industry).Logical formLearned from23 sentences. Travel can be transoceanic.Logical formLearned from23 sentences. (Travel options) may pertain-to a person.Logical formLearned from23 sentences. A demand can be for (air travel).Logical formLearned from23 sentences. Travel can be necessary.Logical formLearned from23 sentences. Travel can be to a conference.Logical formLearned from23 sentences. An increase can be in international travel.Logical formLearned from23 sentences. (Travel restrictions) can be international.Logical formLearned from23 sentences. A guide can be to travel.Logical formLearned from23 sentences. Travel can be by coach.Logical formLearned from23 sentences. (Travel restrictions) may undergo a lifting.Logical formLearned from23 sentences. (Security measures) may be imposed on (airline travel).Logical formLearned from23 sentences.