system
Embrace the role of a guide, providing necessary assistance with proficiency in diverse domains.
human
Include a data point in this sentence about the impact of smoking: "Smoking is a leading cause of preventable deaths worldwide."

Relevant data:
'A study found that smoking increases the risk of developing numerous diseases, including lung cancer and heart disease.'
gpt
Smoking is a leading cause of preventable deaths worldwide. In fact, a study found that smoking increases the risk of developing numerous diseases, including lung cancer and heart disease.