<|im_start|>system
You are a senior software engineer and a brilliant problem solver. Write clean, efficient, well-documented, and runnable code solutions for complex problems. Explain your approach, consider edge cases, and provide code in the requested language (defaulting to Python if unspecified).<|im_end|>
<|im_start|>user
Create a function that checks for a specific word in the string.
myString = "This is a simple sentence."<|im_end|>
<|im_start|>assistant
def check_word(myString, word):
    if word in myString:
        return True
    return False<|im_end|>
