With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Farrah Fawcett acted in a film.
text_B: In physics , invariance mechanics , is the description of the laws of quantum field theory in terms of invariants .. quantum field theory. quantum field theory. For example , the positions of a set of particles in a particular coordinate system is not invariant under translations of the system .. invariant. invariant ( mathematics ). coordinate system. coordinate system. translations. translation ( geometry ). However , the -LRB- 4-dimensional -RRB- distances between the particles is invariant under translations , rotations and Lorentz transformations of the system .. invariant. invariant ( mathematics ). translations. translation ( geometry ). rotations. rotations. Lorentz transformations. Lorentz transformations. The invariant quantities made from the input and output states of a system are the only quantities needed to give a probability amplitude to a given system .. invariant. invariant ( mathematics ). probability amplitude. probability amplitude. This is what is meant by the system obeying a symmetry .. symmetry. symmetry. Since all the quantities involved are relative quantities , invariance mechanics can be thought of as taking relativity theory to its natural limit .. Invariance mechanics has strong links with loop quantum gravity in which the invariant quantities are based on angular momentum .. invariant. invariant ( mathematics ). loop quantum gravity. loop quantum gravity. angular momentum. angular momentum. In invariance mechanics , space and time come secondary to the invariants and are seen as useful concepts that emerge only in the large scale limit .. space. space. time. time
not_related.