1. FIXED: Content-Type extraction from dict would throw exception when absent (should fail silently). 2. FIXED: Take the default graph set by the calling context into account, i.e. not always `user`.
1. FIXED: Content-Type extraction from dict would throw exception when absent (should fail silently).
2. FIXED: Take the default graph set by the calling context into account, i.e. not always `user`.

Anniepoo/plRdf