Use .contains() to retrieve values from DynamoDB

I'm new with NoSQL Databases and am stuck with a problem. I just want to get keys from a table in DynamoDB that contains a specific value. I know that for key equals I can use:

response = table.query(
    KeyConditionExpression=Key('year').eq(1992) 
) 

But I can't use:

 response = table.query(
    KeyConditionExpression=Key('year').contain('1992') 
) 

The error is:

Key object has no attribute contain.