Instruct: Given a premise, retrieve hypotheses that are entailed by the premise.
Query: Digging in a different trench Phoenix's robotic Arm connected with a hard surface that has scientists excited about the prospect of next uncovering an icy layer.  "We have dug a trench and uncovered a hard layer at the same depth as the ice layer in our other trench," said Washington University robotic arm investigator for Phoenix, Ray Arvidson. The arm tried at least three times to penetrate the layer, but was unsuccessful. As a result the arm went into a holding pattern, awaiting its next commands.
There is more than one trench.
Ray Arvidson has at least robotic arms on his body.
Ray Arvidson was a robot from Washington University.
The computer made their arm hurt badly.
Ray Arvidson was a robot created at Washington University.
The new ARC mate welding Robot is completely different than the model 3 years ago.
 Ray Arvidson works for NASA
An investigation took place.
Derwael Ice Rise has fossils in the depth of its ice layers that have yet to be discovered.
Ray Arvidson is actually a robot, not a person.
Scientists are in a race to find the oldest fossil.
John used a device that could detect motion.
The astronauts remained firmly attached to base
Accoustic methods can sense deep ocean trenches.
The new ARC Mate robot is a bit more expensive than previous models.
More is awaiting to be discovered at the site.
The deposition was taken when it was cold outside 
When using a device that could detect motion, John found that plastic devices give off a certain chemical.
Viktor Sarianidi had previous experience with excavations. 
It took a long time to dig the six feet down.
Distant ocean bottoms are often explored with other methods too.
The obstacle is fresh.
Ray Arvidson tried to penetrate the robot with his arm.
The arm tried at least three times to penetrate Ray Arvidson, but was unsuccessful.
Robot arms can receive commands from human operators when excavating beneath the surface of planets.