Add example of using a LangChain tool and fetching data, summarizing, and doing NER and sentiment analysis

[discdiver]

Feel free to make suggestions. I haven't added this as an example card and this is in the examples folder outside of the docs examples. I can add it into docs folder and create a card if desired.

Results:

["1. Apple Inc. reports record quarterly earnings, driven by strong iPhone sales and growth in services. The company's stock surged by 5% in after-hours trading.", '2. Amazon announces major expansion into healthcare with the acquisition of a telemedicine company, aiming to revolutionize the industry.'] 1. Apple Inc. (Positive) 
2. Amazon (Neutral)