Item:Q4594: Difference between revisions
Created a new Item: contamination, presence of an unwanted constituent, harmful substance or impurity in a material, physical body, or environment |
Created claim: subclass of (P1): presence (Q2889) |
||
| Property / subclass of | |||
| Property / subclass of: presence / rank | |||
Normal rank | |||
| Property / subclass of: presence / qualifier | |||