(at time T1 I saw that object X was at location Y)

(again at later time T2 I saw that object X was still at location Y)

(where is object X)

(at time T1, where was object X)

(in plan case P1, if it is known where object X should be at time
 T3 in the future, please tell me.)

(the last known location of object X is Y)

(the default location of object X is Y)

(the default location of object X was changed at time T4)

(it is unknown where object X was at time t5)

(object X was purchased at time t6)

(object X was sold, consumed or destroyed at time t7)

(there are 3 copies of object X in stock, in various conditions - c1, c2 and c3)

(object X may have been at location L sometime around duration T8 - T9)

(we've run out of object X as of now)

(consumable X is expected to be fully consumed by time T)

(condition C holds at time T)

(object X is not where I left it)

(I can't find object X)

(object X has been lost since approximately time T)