# Bi-Merge (String)

### Description
Similar to block `Merge`, but also transports the strings in the second column of `B` to both outputs (`A1` and `A2`).
Finds all items in `A` for which the second column matches an object from `B`.
Usually used to merge back objects which have previously been split.

### Input
- `PAIRS [OBJ,OBJ]`: a list of pairs to be matched
- `A [OBJ,STRING]`: a list of pairs to be matched against `PAIRS`'s first column
- `B [OBJ,STRING]`: a list of pairs to be matched against `PAIRS`'s second column

### Output
- `A2B2 [STRING,STRING]`: All the columns not involved in the match


Output scores can be [aggregated](docs://score_aggregation) and/or [normalised](docs://score_normalisation).