Suppose n > 1 and let S^n be the n-sphere in R^{n+1}. Let e be the unit-coordinate vector (1,0,...,0) on S^n. Prove that the fundamental group pi_1(S^n;e) is the trivial group.

Okay, now my question is what does the notation "pi_1(S^n;e)" mean?

I understand the fundamental group but I don't understand the "semi-colon and then an element"-part.

Thank you!