Please provide a step-by-step instruction for completing the Keyword Tagging task. The generated instruction will be directly used as the input of the generative pre-trained language models. The instruction should be simple and easy to understand, without any specific examples. 
    
 Note that: The instruction should only focus on the current example. Do not contain the step of iterating through the dataset. 

Keyword Tagging: In this task, you need to write a topic word from the given fact. The topic word must have at least one word overlap with the given fact. The topic word often involves adding a new word from a related concept. In your topic word, use at least one word from the given fact. Topic words with two or more words work best.