context: Microsoft first released a test version of a shell refresh in the 1995 entitled Shell Technology Preview. This is often informally referred to as the "NewShell". [1] Windows Explorer was later introduced to remove the shell based on Windows 3.x Program Manager / File Manager. It has almost the same capabilities as the Windows "Chicago" (Windows 95 codename) shell in its final beta stages. However, this is not intended to be a test release. [2] Two public releases of the Shell Technology Preview were made available to MSDN and CompuServe users on May 26, 1995 and August 8, 1995. They both have 3.51.1053.1 architectures of Windows Explorer. The shell was not released to the final release under the Technology Preview Program NT 3.51. The full program then reached the Cairo development team. The team finally released the new shell design with the release of NT 4.0 in July 1996 as NT code.
question: In which year did Microsoft first release a test version of a shell refresh called Shell Technology Preview?
answers.text: 1995