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Dina Nassar (1st L), entertains children, who are cancer patients, in her clown costume inside a hospital in Gaza City, Aug. 8, 2018. Five years ago after Dina's father died of cancer, she started to volunteer in Basmit Amal Association, a foundation for cancer care service, in Gaza. Now Dina Nassar and a whole team of volunteers play clowns in their spare time to draw a smile on children's lips. (Xinhua)?