With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: A Song of Ice and Fire is written by GRRM.
text_B: SunPCi is a series of Single Board Computers with a PCI connector that adds hardware which enables Sun workstations to act as an ` PC compatible ' computer .. PCI. Peripheral Component Interconnect. It includes an x86 processor , RAM , expansion ports , and an onboard graphics controller , allowing complete x86 operating environments on Sun Workstations .. x86. x86. Its present incarnation is the SunPCi IIIPro based on a Mobile 1.6-GHz AMD Athlon XP 2100 + processor .. These cards are the successor to the SunPC series of SBus cards .. SBus. SBus
not_related.