What is the fine-grained topic of the following text: AbbVie, AstraZeneca PLC AZN, -0.15% AZN, +1.72% , Bristol-Myers Squibb Co. BMY, +0.18% , Merck & Co. Inc. MRK, +1.55% , Pfizer Inc. PFE, +1.13% and Sanofi SA SNY, +0.87% SAN, +1.78% sent their chief executives to Capitol Hill on Tuesday, while Johnson & Johnson JNJ, +1.50% dispatched an executive vice president to testify. Only return the topic.
Pharmaceutical companies' executives testifying on Capitol Hill