...are astoundingly versatile

"stem cells taken from animal embryos" are astoundingly versatile

Link to M5

- M5 represents the stem cells taken from animal embryos. M5 is said to be non-restrictive and therefore this leads to an interpretation that "Stem cells" are "astoundingly versatile".

An example of a restrictive clause:

Stem cells taken from animal embryos are astoundingly versatile.

An example of a non-restrictive clause:

Stem cells, which are taken from animal embryos, are astoundingly versatile.