Task: Instance Class Understanding (ontology: Sciences/Computer_Science)

Which of the following classes does 'G3: Poorly differentiated' belong to as one valid explicit type? Context: A histologic grade according to AJCC 7th edition indicating that the tumor cells are poorly differentiated and do not look like normal cells and tissue.

A. histologic grade for ovarian tumor according to a two-tier grading system
B. pathologic lymph node stage for kidney according to AJCC 7th edition
C. histologic grade according to AJCC 7th edition
D. pathologic lymph node stage for lung according to AJCC 7th edition

Answer: histologic grade according to AJCC 7th edition