I deleted the link to metaphor.
I deleted the link to metonymy since it is not part of this verse.
I deleted my confusing sentences contrasting what the seed represented in v14 (the word) and what it represents in 15 (the people).
I changed the first note so that the snippet and AT match.
I changed the second note so that it explains the meaning of the parable, rather than focusing on the images in the parable.