Avoiding the case sensitivity in python

Question

I need to make the code below disregard any case sensitivity Here's the code:

sentence=str(input("Enter sentence")
words=sentence.split()
uword=input("enter word from sentence")
if uword in words:
    print("Word is in sentence")
else:
    print("Word isn't in sentence")

For example if I inputted the sentence "Hello World" as the sentence variable and then inputted "hello" as the uword variable the code should recognise that hello and Hello are the same and print (" Your word is in the sentence")