Assertion: train's number | /r/CapableOf | remain unaltered
Facets:
Source sentences:
text: When on Network Rail metals (i.e. south of Pelaw to South Hylton) the initial digit '1' is replaced by '2I' to give a 4-digit TOPS Train Reporting Number, e.g. train 104 becomes 2I04, although the 3-digit number in the cab remains unaltered.