Authority can be open-ended.Logical formLearned from71 sentences. A discussion can be open-ended.Logical formLearned from71 sentences. An extension can be open-ended.Logical formLearned from71 sentences. A ceasefire can be open-ended.Logical formLearned from69 sentences. A series can be open-ended.Logical formLearned from68 sentences. A protest can be open-ended.Logical formLearned from68 sentences. Strikes can be open-ended.Logical formLearned from67 sentences. A game can be open-ended.Logical formLearned from66 sentences. An investigation can be open-ended.Logical formLearned from64 sentences. Presence can be open-ended.Logical formLearned from63 sentences. A campaign can be open-ended.Logical formLearned from63 sentences. Activities can be open-ended.Logical formLearned from61 sentences. A basis can be open-ended.Logical formLearned from60 sentences. A questionnaire can be open-ended.Logical formLearned from59 sentences. A suspension can be open-ended.Logical formLearned from57 sentences.