Give an example for the text that supports the statement that Dr. Patricia Bath had tenacity.

One example that supports Dr. Patricia Bath's tenacity is her persistence in pursuing her medical career despite facing numerous challenges and discrimination. Despite growing up in segregated Harlem, where opportunities for African American students were limited, Dr. Bath excelled academically, eventually becoming the first African American resident in ophthalmology at New York University. Moreover, Dr. Bath faced even more obstacles as she entered the field of medical research. When she proposed her invention of the Laserphaco Probe, a device that could remove cataracts painlessly and non-invasively, she faced skepticism and resistance from fellow colleagues and superiors who doubted its feasibility. However, Dr. Bath persevered and remained resolute in pursuing her invention, eventually patenting the Laserphaco Probe in 1988 and becoming the first African American female doctor to receive a patent for a medical invention. This example showcases Dr. Bath's tenacity in the face of adversity, demonstrating her determination to overcome obstacles and make groundbreaking contributions to the field of medicine.