Update README.md

Add description of use and limitations.

README.md

@@ -33,16 +33,29 @@ It achieves the following results on the evaluation set:
 ## Model description
 
 The model has been trained to perform token classification task by training the bert-base-cased model. The tokens to be classified correspond to 
-the values and units of scientific measurements. This is a work in progress.
+the values and units of scientific measurements. 
 
 For example in the sentence:
+
 "Place the seeds in a refrigerator at 4°C along with a small amount of water for 2-3 days."
 
 The model will select "4°C" and identify the value as 4 and the unit as °C
 
+"Centrifuge at 863g for 5 min at room temperature (18–28°C), decant supernatant and resuspend cells in culture medium."
+
+The model will identify to value-unit combinations:
+
+ - VALUE : 863, UNIT: g
+ - VALUE : 18 - 28, UNIT: '°C'
+
 ## Intended uses & limitations
 
-More information needed
+Identify VALUES and scientific UNITS from a sentence.
+
+This is a work in progress and currently only identifies the units: 
+ - Temperature: '°C'
+ - Mass (grams): 'g, ug, mg'
+ - Volume (L): 'L, uL, mL'
 
 ## Training and evaluation data