Assertion: scotch boiler | /r/HasProperty | the primary steam generator
Facets:
value: on a ship
type: LOCATION
value: nowadays
type: TEMPORAL
value: rarely
type: DEGREE
Source sentences:
text: Although the Scotch boiler is nowadays rarely the primary steam generator on a ship, small dry-back designs such as the Minipac are still encountered, for supporting secondary demands whilst alongside in port with the main boilers cold.