In this task, you will be given sentences in which your task is to recognize the name of the drug or medicine. Drugs are substances that change a person's mental or physical state. They can affect how your brain works, how you feel and behave, your understanding, and your senses. Although there might be several correct answers, you need to write one of them.

Ex Input:
Indolent aspergillus arthritis complicating fludarabine-based non-myeloablative stem cell transplantation.

Ex Output:
fludarabine


Ex Input:
BACKGROUND: The risk/benefit ratio of warfarin therapy changes in the over 75s, when haemorrhagic side-effects become more common.

Ex Output:
warfarin


Ex Input:
A 21-year-old man with Tourette's syndrome, pedophilia, Asperger's syndrome, and multiple sclerosis experienced seizures after receiving therapy with interferon beta-1a.

Ex Output:

interferon beta-1a