Mysql – Would you create a composite primary key or a normal primary key if a 'Full Address' is the main identifier

Context: I’ve been creating a database for a class assignment, the assignment doesn’t have detailed instructions, instead gives us a narrative in order to have us make our own assumptions and interpretations as to what to create for the database. Essentially a database that has employees and a factory. Factories are identified using their Full Address ,and have several other attributes.

I essentially have the entire ERD modeled and MYSQL code drafted based on my interpretation of the narrative, however I’m having zero clue on what to do with the "Full Address" identifier. Considering it says that its a "full address", my two main assumptions are either this:

I create a composite primary key with Street Number, Road, City, etc.

Or I make a varchar primary key that simply has the address as a string variable and nothing much.
This is what I have originally, but I’m having second thoughts.

CREATE table factory
( address VARCHAR(100),
  yearbuilt INT,
  PRIMARY KEY (address)
);

If I should make a composite primary key for this table, how would I code a composite primary key for a full address in MYSQL?, and how would I code this as a foreign key for other tables?