Silly grammar question

[Lagz]

I'm getting myself really confused. Should there be the ' in "examples" in this sentence?

The loss of information of the forward transformation is defined to be the sum of the squared reconstruction errors for each of the training example’s input vectors.

 

[Lagz]

lol glad to see responses. I believe it is examples'. Thanks

ps: It reads well in its context. Its quite a technical piece of writing.