Update README.md

README.md

@@ -17,7 +17,7 @@ Easily build knowledge-intensive LLM applications that reason over your data wit
 LOTUS (**L**LMs **O**ver **T**ables of **U**nstructured and **S**tructured Data) provides a declarative programming model and an optimized query engine for serving powerful reasoning-based query pipelines over structured and unstructured data! We provide a simple and intuitive Pandas-like API, that implements **semantic operators**. 
 
 ## Key Concept: Semantic Operators
-LOTUS' programming model is powered by semantic operators. Semantic operators seamlessly extend the relational model with a set of modular language-based operators, allowing you to write AI-based pipelines with high-level logic, leaving the rest of the work to the query engine! Programmers can easily compose semantic operators along with traditional relational data operations to build state-of-the-art AI systems that reason over vast knowledge corpora.
+LOTUS' programming model is powered by semantic operators. We define semantic operators as declarative transformations on one or more datasets, parameterized by a natural language expression, that can be implemented by a variety of AI-based algorithms. Semantic operators seamlessly extend the relational model, operating over tables that may contain traditional structured data as well as unstructured fields, such as free-form text. These composable, modular language- based operators allow you to write AI-based pipelines with high-level logic, leaving the rest of the work to the query engine! Each operator can be implemented and optimized in multiple ways, opening a rich space for execution plans, similar to relational operators.
 
 Below are just a few semantic operators provided by LOTUS. To learn more about semantic operators, check out the full [documentation](https://lotus-ai.readthedocs.io/en/latest/), run the [colab tutorial](https://colab.research.google.com/drive/1OzoJXH13aOwNOIEemClxzNCNYnqSGxVl?usp=sharing), or read the full [research paper](https://arxiv.org/abs/2407.11418). You can also refer to these [examples](https://github.com/TAG-Research/lotus/tree/main/examples/op_examples) for using semantic operators in LOTUS.