SICP metacircular interpreter question

How does it handle sequences in input? If it's in a define or lambda or begin or whatever then it follows those respective paths in the eval branch, all of which lead to eval-sequence. But if it's just
(define a 1) (define b 2)
how's it interpret that?

>>7
I think all you should be able to find is the implementation specifications. The creation of an actual interpreter is left as an exercise to the reader.