Here's the text with the appropriate segments converted into Prolog:

```prolog
% Type definition: the hierarchy of object types.
type(robot).
type(location).
type(item).
subtype(item, [snack, drink, tool]).
subtype(snack, [fruit, non_fruit]).
subtype(drink, [soda, non_soda]).

% Object definition: specific objects of each object type defined above.
object(me, robot).
object([counter, table, user, trash, bowl, initial], location).
object([apple, orange], fruit).
object([kettle_chips, multigrain_chips, jalapeno_chips, rice_chips, energy_bar], non_fruit).
object([seven_up, coke, lime_soda, grapefruit_soda, pepsi], soda).
object([tea, redbull, water], non_soda).
object(sponge, tool).

% Predicate definition: relations between objects.
predicate(at(Object, Location)) :- object(Object), object(Location, location).
predicate(inventory(Robot, Item)) :- object(Robot, robot), object(Item, item).
predicate(visited(Location)) :- object(Location, location).
predicate(is_caffeinated(Item)) :- object(Item, item).
predicate(is_salty(Item)) :- object(Item, item).
predicate(is_sweet(Item)) :- object(Item, item).
predicate(is_spicy(Item)) :- object(Item, item).
predicate(is_clear(Item)) :- object(Item, item).
predicate(is_refreshing(Item)) :- object(Item, item).

% When parsing the user query into a goal, I can only use the types, objects, and predicates defined above, and the following logical operators:
logical(and(ListOfStatements)) :- forall(member(Statement, ListOfStatements), call(Statement)).
logical(or(ListOfStatements)) :- member(Statement, ListOfStatements), call(Statement).
logical(not(Statement)) :- \+ call(Statement).
logical(forall(Type, Statement)) :- forall(object(Object, Type), call(Statement, Object)).
logical(exists(Type, Statement)) :- object(Object, Type), call(Statement, Object), !.
logical(equals(Object1, Object2)) :- Object1 = Object2.
logical(imply(Statement1, Statement2)) :- (call(Statement1) -> call(Statement2)).
```
