Premise & hypothesis.
Two cowboys on horses chase a young cow with lassos'.

Cowboys on horses lassoing cattle.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A band consisting of a guitarist, saxophonist, and a trumpeter.

The band has a guitarist.
++++++++++
true or not.
yes

Premise & hypothesis.
A brown and white dog is standing in the river by the bank.

Two dogs are getting wet.
++++++++++
true or not.
it is not possible to tell