Read the following paragraph and determine if the hypothesis is true:

How to substitute for mustard seed<br>Use prepared horseradish to add spice. Prepared horseradish is made by combining ground horseradish with vinegar, and sometimes other spices, to form a sauce. You can get it from your local supermarket.

Hypothesis: Mustard seed has other substitutes than just horseradish.
It's impossible to say