Give an overview of the different strategies and techniques commonly used for summarizing written materials, with a focus on extractive and abstractive methods.
Give an overview of the different strategies and techniques commonly used for summarizing written materials, with a focus on extractive and abstractive methods.
user
There are two main strategies for summarizing written materials: extractive and abstractive. Extractive summarization involves identifying and extracting the most important sentences or phrases from the original text and combining them to form a coherent summary. This can be done manually or using computational methods like scoring and ranking sentences based on features like word frequency or position. Abstractive summarization, on the other hand, aims to generate entirely new sentences that capture the essence of the text, much like how a human would summarize. This often involves advanced natural language processing techniques like semantic analysis, information fusion, and text generation. Abstractive methods can produce more concise and fluent summaries but are generally more complex and computationally intensive.
assistant
Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: Give me a one-sentence summary of this text, please. 

Lowland forest
This type of forest is found at elevations of up to approximately 1000 metres within the tropical belt. Due to the high rainfall and constant warm temperatures, they provide the perfect environment for plants and animals and so contain a great diversity of life. Lowland rainforests contain the tallest trees of all the types of rainforest, with the largest variety of species. (Source: mongabay.com)
Response: Lowland forests exist in the tropical belt at elevations up to 1,000m, where warm, wet conditions support diverse flora and fauna and the biggest rainforest trees. 

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in valid JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.
