ORGANIZATION@1 's third fundamental design of carriage was designated ` Mark NUMBER@1 ' -LRB- also described as PERSON@1 -RRB- , and was developed primarily for the InterCity NUMBER@2 High Speed Train -LRB- HST -RRB- .

ORGANIZATION@1 's third fundamental design of carriage was designated Mark NUMBER@1 , and was introduced in NUMBER@3 primarily for use on the MISC@1 -LRB- HST -RRB- .
