Add rulePrecision2

Summary: about <volume>

Reviewed By: haoxuany

Differential Revision: D28390051

Pulled By: chessai

fbshipit-source-id: a357bbd15ab77578fda477eae6303158824458da

Duckling/Volume/ZH/Corpus.hs

@@ -42,6 +42,7 @@ allExamples = concat
   , examples (simple Litre 0.5)
              [ "半公升"
              , "0.5L"
+             , "0.5L左右"
              ]
   , examples (simple Litre 0.25)
              [ "四分一升"
@@ -87,9 +88,13 @@ allExamples = concat
              [ "至少四ml"
              , "最少四毫升"
              , "四毫升或以上"
+             , "起碼四毫升"
              ]
   , examples (simple Millilitre 5)
              [ "一茶匙"
              , "三分一湯匙"
              ]
+  , examples (between Litre (60, 70))
+             [ "六十到七十L"
+             ]
   ]

Duckling/Volume/ZH/Rules.hs

@@ -79,6 +79,18 @@ rulePrecision = Rule
       _ -> Nothing
   }
 
+rulePrecision2 :: Rule
+rulePrecision2 = Rule
+  { name = "about <volume> (second rule)"
+  , pattern =
+    [ dimension Volume
+    , regex "左右"
+    ]
+  , prod = \case
+      (t:_) -> Just t
+      _ -> Nothing
+  }
+
 ruleIntervalBetweenNumeral :: Rule
 ruleIntervalBetweenNumeral = Rule
   { name = "between|from <numeral> and|to <volume>"
@@ -183,6 +195,7 @@ rules :: [Rule]
 rules = [ ruleUnitTeaspoon
         , ruleUnitSoupspoon
         , rulePrecision
+        , rulePrecision2
         , ruleIntervalBetweenNumeral
         , ruleIntervalBetween
         , ruleIntervalMax