Triples added with no context (via add_triple)

[Ben]

Hi,

I'm relatively new to Surf, but I am having some weirdness when I try to add triples to a Sesame store using Surf. Specifically, the triples are added, but the context is not. 

Specifically, the code:

session.default_store.add_triple (s, p, o, surf.rdf.URIRef("http://hi/me"))

will add the s, p, o, but not to any context. 

Am I doing something wrong with the context? Has anyone else had this issue?