With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ratatouille is Pixar Animation Studios' eighth film produced.
text_B: In physics , specifically in relativistic quantum mechanics and quantum field theory , the Pauli -- Lubanski pseudovector named after Wolfgang Pauli and Jozef Lubanski is an operator defined from the momentum and angular momentum , used in the quantum-relativistic description of angular momentum .. physics. physics. relativistic quantum mechanics. relativistic quantum mechanics. quantum field theory. quantum field theory. Wolfgang Pauli. Wolfgang Pauli. Jozef Lubanski. Jozef Lubanski. operator. operator ( physics ). angular momentum. angular momentum. It describes the spin states of moving particles .. It is the generator of the little group of the Poincare group , that is the maximal subgroup -LRB- with four generators -RRB- leaving the eigenvalues of the four-momentum vector invariant .. little group. little group. Poincare group. Poincare group. four-momentum. four-momentum
not_related.