Killings can be mysterious.Logical formLearned from129 sentences. A motive can be behind a killing.Logical formLearned from128 sentences. Al-zarqawi may undergo a killing.Logical formLearned from128 sentences. Babies may undergo a killing.Logical formLearned from126 sentences. News may pertain-to killings.Logical formLearned from125 sentences. A killing can be motivated.Logical formLearned from125 sentences. Retaliation can be for a killing.Logical formLearned from125 sentences. A killing may pertain-to year.Logical formLearned from125 sentences. Reports can be constituted-of-or-filled-with (mass killings).Logical formLearned from124 sentences. Activists may undergo a killing.Logical formLearned from124 sentences. Hostages may undergo a killing.Logical formLearned from124 sentences. A person can be behind a killing.Logical formLearned from123 sentences. Shiites may undergo killings.Logical formLearned from122 sentences. A killing may pertain-to a curator.Logical formLearned from120 sentences. A killing can be large-scale.Logical formLearned from120 sentences.