Strictly speaking <blockquote> is a block element and <q> is an inline element. This means <blockquote> is automatically on a new line whereas <q> is not.
So for your example you could use:
Friendshipby Robert Jacobsen.
We went to see the sculpture “Friendship” by Robert Jacobsen.
We went to see the sculpture "Friendship" by Robert Jacobsen.
The <q></q> wraps the word Friendship in ‘smart’ quotation marks. i.e. We went to see the sculpture “Friendship” by Robert Jacobson.
If you prefer not to use <q> you can get the same result by using “ and ” in your markup.
Finally ,you can use " which results in "Friendship". i.e. standard quotation marks.
Hope that gives you a few options to try out.