With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: River Phoenix was on television.
text_B: Spring is a discontinued project / experimental microkernel-based object oriented operating system developed at Sun Microsystems in the early 1990s .. microkernel. microkernel. object oriented. object oriented. operating system. operating system. Sun Microsystems. Sun Microsystems. Using technology substantially similar to concepts developed in the Mach kernel , Spring concentrated on providing a richer programming environment supporting multiple inheritance and other features .. Mach kernel. Mach kernel. multiple inheritance. multiple inheritance. Spring was also more cleanly separated from the operating systems it would host , divorcing it from its Unix roots and even allowing several OSes to be run at the same time .. Unix. Unix. Development faded out in the mid-1990s , but several ideas and some code from the project was later re-used in the Java programming language libraries and the Solaris operating system .. operating system. operating system. Java. Java ( programming language ). programming language. programming language. Solaris. Solaris ( operating system )
not_related.