Your AI-Assistant for Parsing Complex Datasets

Create a script using an AI language model to parse DataType from a complex dataset in FileFormat format. The script should include comments explaining each step for better understanding. Ensure the script efficiently extracts the necessary data fields and outputs them in a structured format, such as a CSV or JSON file. Consider edge cases and provide error handling to manage unexpected data variations. Additionally, include a brief section on how to modify the script for parsing similar datasets with different structures.