Read the text and determine if the sentence is true (see options at the end):

How to get your dog to pee on command<br>Choose a trigger word or phrase to use. When teaching a dog a command you need to come up with a verbal trigger. This should be a word or sound that indicates to the dog what you would like it to do.

Sentence: Dogs can only understand three triggers words.
Options:
+ Yes
+ It's impossible to say
+ No
It's impossible to say