A male may suffer some heart-attacks.Logical formLearned from2 sentences. Nurses may check on (heart-attack patients).Logical formLearned from2 sentences. Heart-attacks may be provoked by a cold.Logical formLearned from2 sentences. Some other persons may die of heart-attacks.Logical formLearned from2 sentences. Heart-attacks may be bring_oned by fires.Logical formLearned from2 sentences. A spectator may collapse with a heart-attack.Logical formLearned from2 sentences. A heart-attack can be on a month.Logical formLearned from2 sentences. (Heart-attack patients) may get a prescription.Logical formLearned from1 sentences. (Heart-attack patients) may be discharged from a hospital.Logical formLearned from1 sentences. (Heart-attack patients) may be injected with (stem cells).Logical formLearned from1 sentences. (Heart-attack victims) may die.Logical formLearned from1 sentences. Significant differences can be in (heart-attack rates).Logical formLearned from1 sentences. A female may track (heart-attack survivors).Logical formLearned from1 sentences. Some percent can be constituted-of-or-filled-with (heart-attack survivors).Logical formLearned from1 sentences. Some percent of (heart-attack survivors) may take aspirin.Logical formLearned from1 sentences.