Question: What is this disease related to abnormality in the oxygen-carrying protein haemoglobin that Chukwuedu Nwokolo is carrying out research on?
{'answer': 'Sickle-cell disease', 'supporting_facts': [['Chukwuedu Nwokolo', 3], ['Sickle-cell disease', 0], ['Sickle-cell disease', 2]]}