question: What type of geology is the Niger Delta Nembe Creek Oil field ?
answer: middle Miocene deltaic sandstone-shale in an anticline structural trap
turker_answer: The Niger Delta Nembe Creek Oil field is in the middle Miocene deltaic sandstone-shale in an anticline structural trap .
rule-based: The Niger Delta Nembe Creek Oil field is middle Miocene deltaic sandstone-shale in an anticline structural trap .