user: Extract all risk factors for developing cardiovascular diseases for which numbers about their  contribution are given and rank them by their relative importance.

assistant: 1. Dietary Risk Factors
2. High Blood Pressure
3. Tobacco
4. Diabetes
5. Lack of exercise
6. Obesity

user: how to get started with data science and machine learning?

assistant: To be a good data scientist, you need a solid understanding of statistics and machine learning algorithms like linear regression, logistic regression, and tree-based models. Knowledge and experiences with deep learning concepts are a big plus nowadays in the job market. In addition, business acumen and good communication skills can help you bridge the gap between technical and business stakeholders. Here are a few recommended study materials: Coursera course Machine Learning by DeepLearnin.AI; Introduction to Machine Learning with Python: A Guide for Data Scientists; Hands-On Machine Learning with Scikit-Learn and TensorFlow: Concepts, Tools, and Techniques to Build Intelligent Systems. But most importantly, keep learning and start now!

user: Why does a US $20 bill have a vertical strip on it when held to light?

assistant: Paper money has counterfeit measures to ensure it is very difficult to duplicate/fake