Assertion: manganese | /r/HasSubevent | stain
Facets:
value: on the pool surfaces
type: LOCATION
value: on tile grouting
type: OTHER
value: on marcite
type: LOCATION
value: on pebble-tec
type: LOCATION
value: on plaster
type: LOCATION
Source sentences:
text: Manganese can result in stains on the pool surfaces, especially on plaster, pebble-tec, marcite and tile grouting.