With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Tanya Roberts was born in 1957.
text_B: The four laws of thermodynamics define fundamental physical quantities -LRB- temperature , energy , and entropy -RRB- that characterize thermodynamic systems at thermal equilibrium .. thermodynamics. thermodynamics. temperature. temperature. energy. energy. entropy. entropy. thermodynamic systems. thermodynamic system. thermal equilibrium. thermal equilibrium. The laws describe how these quantities behave under various circumstances , and forbid certain phenomena -LRB- such as perpetual motion -RRB- .. perpetual motion. perpetual motion. The four laws of thermodynamics are  :. thermodynamics. thermodynamics. Zeroth law of thermodynamics  : If two systems are in thermal equilibrium with a third system , they are in thermal equilibrium with each other .. thermodynamics. thermodynamics. thermal equilibrium. thermal equilibrium. Zeroth law of thermodynamics. Zeroth law of thermodynamics. law. Physical law. This law helps define the notion of temperature .. temperature. temperature. law. Physical law. First law of thermodynamics  : When energy passes , as work , as heat , or with matter , into or out from a system , the system 's internal energy changes in accord with the law of conservation of energy .. thermodynamics. thermodynamics. energy. energy. First law of thermodynamics. First law of thermodynamics. work. Work ( thermodynamics ). heat. heat. internal energy. internal energy. conservation of energy. conservation of energy. law. Physical law. Equivalently , perpetual motion machines of the first kind are impossible .. perpetual motion. perpetual motion. Second law of thermodynamics  : In a natural thermodynamic process , the sum of the entropies of the interacting thermodynamic systems increases .. thermodynamics. thermodynamics. thermodynamic systems. thermodynamic system. Second law of thermodynamics. Second law of thermodynamics. thermodynamic process. thermodynamic process. law. Physical law. Equivalently , perpetual motion machines of the second kind are impossible .. perpetual motion. perpetual motion. Third law of thermodynamics  : The entropy of a system approaches a constant value as the temperature approaches absolute zero .. thermodynamics. thermodynamics. temperature. temperature. entropy. entropy. Third law of thermodynamics. Third law of thermodynamics. absolute zero. absolute zero. law. Physical law. With the exception of non-crystalline solids -LRB- glasses -RRB- the entropy of a system at absolute zero is typically close to zero , and is equal to the logarithm of the product of the quantum ground states .. entropy. entropy. absolute zero. absolute zero. logarithm. natural logarithm. There have been suggestions of additional laws , but none of them achieves the generality of the four accepted laws , and they are not mentioned in standard textbooks .. The laws of thermodynamics are important fundamental laws in physics and they are applicable in other natural sciences .. thermodynamics. thermodynamics. physics. physics. sciences. sciences
not_related.