Washington Scientists have identified a hormone that significantly extends the lifespan of mice, a discovery that could mark a crucial step toward developing drugs that boost longevity in people.
Hormone extends the lifespan of rats.
We can't tell whether hormones would work on rats from the context. It's neither.
( z1 extend :ARG0 ( z2 hormone ) :ARG1 ( z3 live :ARG0 ( z4 rat ) ) )