Statements:
Some hills are rivers.
Some rivers are deserts.
All deserts are roads.
Conclusions:
I. Some roads are rivers.
II. Some roads are hills.
III. Some deserts are hills.

First and second Premises are Particular Affirmative (I-type).
Third Premise is Universal Affirmative (A-type).
Some rivers are deserts. All deserts are roads.
I + A ? I-type of Conclusion "Some rivers are roads."
Conclusion I is Converse of it.