1. Syntactic Category Prediction for Improving Translation Quality in English-Korean Machine Translation
Sung-Dong Kim,
Dept. of Computer Engineering,
Hansung University,
Republic of Korea

2. Abstract Syntactic category prediction In this work
Guide parser to identify segment relationships
Select correct parsing results for each segment
In this work
Feature design
Decision tree generation  generation of prediction rules
Prediction accuracy comparison
Contribution to improving translation quality
Syntactic Category Prediction

3. 1. Introduction Long sentence translation Bad translation results
comma-separated phrases/clauses
Sentence segmentation & segment parsing
identify segment relationships
selection of correct segment parsing results
Syntactic Category Prediction

4. Syntactic category prediction of each segment guide parsing
get better translation results
Syntactic Category Prediction

5. 2. Related Works & Parsing Method
A small TCL interpreter, which can be linked into the code, interprets the strings
작은(small) TCL 인터프리터(interpreter), 그 코드(code)로 연결(link)될 수 있는 것(which), 그 문자열(strings)을 해석한다(interprets).
그 코드(code)로 연결(link)될 수 있는 작은(small) TCL 인터프리터(interpreter)는 그 문자열(strings)을 해석한다(interprets).
Syntactic Category Prediction

6. Parsing Steps
Syntactic Category Prediction

7. 3. Generation of Prediction Rules/Functions
Syntactic Category Prediction

8. 3. Feature, Training Data First word First tag Second word Second tag
Last tag
Segment length
Clue for clause
Pierre/NNP Vinken/NNP NP
61/CD years/NNS old/JJ AJP
will/MD join/VB the/DT board/NN as/IN a/DT nonexecutive/JJ director/NN Nov./NNP 29/CD VP
2, NNP, NNP, *NONE*, 2, NNP, 2, NP
0, CD, JJ, *NONE*, 4139, NNS, 3, AJP
4085, MD, CD, MD, 1920, VB, 10, VP
Syntactic Category Prediction

9. 3.Prediction Rules
if (!strcmp(szFirstWord,“that”) && check_IN(firstTrees))
{ setTargetCategory( THAT_CLAUSE ); return; }
if (!strcmp(szFirstWord,"although") && check_IN(firstTrees))
{ setTargetCategory( SUBCL ); return; }
if (check_IN(firstTrees) && checkClauseExist(_NONE) &&
check_NNP(secondTrees))
{ setTargetCategory( PP ); return; }
if (check_CD(firstTrees) && check_NONE(lastTrees))
{ setTargetCategory( NP ); return; }
Syntactic Category Prediction

10. 4. Experiments
Syntactic Category Prediction