Assertion: viagra's sildenafil | /r/AtLocation | another drug
Facets:
Source sentences:
text: Viagra contains sildenafil, which is the same medicine found in another drug called REVATIO.
text: VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO.
text: VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO.
text: VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO.