Persons may acknowledge challenges.Logical formLearned from17 sentences. Contributions may be acknowledged.Logical formLearned from17 sentences. Persons may acknowledge themselves.Logical formLearned from17 sentences. A truth may acknowledge that something-is-the-case.Logical formLearned from17 sentences. A person may acknowledge receipt of a letter.Logical formLearned from17 sentences. A publisher may acknowledge that something-is-the-case.Logical formLearned from17 sentences. (Field abreast) may acknowledge problems.Logical formLearned from17 sentences. Use may acknowledge women.Logical formLearned from17 sentences. A US-president may acknowledge an affair.Logical formLearned from17 sentences. A female may acknowledge problems.Logical formLearned from17 sentences. Advocates may acknowledge that something-is-the-case.Logical formLearned from17 sentences. A captain may acknowledge that something-is-the-case.Logical formLearned from17 sentences. A company may be acknowledged.Logical formLearned from17 sentences. A country may acknowledge a program.Logical formLearned from17 sentences. An administration may acknowledge a difficulty.Logical formLearned from17 sentences.