A rock can be in a center.Logical formLearned from9 sentences. (Reef areas) can be constituted-of-or-filled-with rock.Logical formLearned from9 sentences. A (rock album) can be heavy.Logical formLearned from9 sentences. A (rock band) can be dark.Logical formLearned from9 sentences. A center may pertain-to a rock.Logical formLearned from9 sentences. A song can be by a (rock band).Logical formLearned from9 sentences. Carbonates may be discovered in an outcrop of rocks.Logical formLearned from9 sentences. Rocks can be (coal measures).Logical formLearned from9 sentences. Singer may pertain-to a (punk rock band).Logical formLearned from9 sentences. A third album can be by (alternative rock band).Logical formLearned from9 sentences. A sliver can be constituted-of-or-filled-with rock.Logical formLearned from9 sentences. A (rock musician) may pertain-to a male.Logical formLearned from9 sentences. A band can be in (rock history).Logical formLearned from9 sentences. A (debut album) can be by a (punk rock band).Logical formLearned from9 sentences. (Mainstream rock charts) may pertain-to a country.Logical formLearned from9 sentences.