Windfalls can be periodic.Logical formLearned from3 sentences. A (windfall tax) can be on profits of (utility companies).Logical formLearned from3 sentences. A return can be a windfall.Logical formLearned from3 sentences. Diamonds may prove a windfall.Logical formLearned from3 sentences. A windfall may be offered by riches.Logical formLearned from3 sentences. (Football fans) may bring a windfall.Logical formLearned from3 sentences. Plans can be for a (windfall tax).Logical formLearned from3 sentences. A (windfall tax) may be overshadowed.Logical formLearned from3 sentences. A windfall can be for printers.Logical formLearned from3 sentences. A windfall can be for a regime.Logical formLearned from3 sentences. Governments may enjoy a windfall.Logical formLearned from3 sentences. A windfall can be for states.Logical formLearned from3 sentences. (Windfall revenues) can be accumulated.Logical formLearned from3 sentences. Persons may spend a windfall.Logical formLearned from3 sentences. A government may cut a (windfall tax).Logical formLearned from3 sentences.