Question: How can I find relevant text passages based on a query or search term, is there a library that can help?

Semantic Scholar is a free AI-powered research service that lets scholars search for and read relevant scientific papers in a database of more than 219 million papers across all scientific fields. It's got powerful search filters, brief summaries, and tools to cite papers, organize research and get paper recommendations based on your interests. It also offers AI-generated definitions and answers to questions about papers, making it a great resource for researchers.

Elicit is an AI research assistant designed to help you quickly find and extract information from academic papers. It covers empirical subjects like biomedicine and machine learning where you can search for papers, extract data into tables, identify themes and upload your own papers for analysis. Elicit also can be used for automating systematic reviews and meta-analyses, so it's a good tool for staying up to date with the latest research.

Sourcely is an AI-powered literature sourcing tool that uses sophisticated natural language processing techniques to rapidly retrieve relevant text based on your input. It also features tools like generating credible summaries, exporting references and discovering relevant sources with a single click. With multiple pricing tiers, including a free option, Sourcely is used by more than 10,000 students, researchers and industry professionals.

For those who prefer a more interactive approach, Unriddle offers an AI assistant designed to help you read and research documents more effectively by providing immediate answers to your questions, summarizing complex topics and taking notes. It also links related sources and highlights text so you can quickly grasp information, making it a good tool for researchers who need to read and extract information from lots of documents.