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| you | undertake |
| he/she/it | undertakes |
| we | undertake |
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| they | undertake |
| I | undertook |
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| you | undertook |
| he/she/it | undertook |
| we | undertook |
| you | undertook |
| they | undertook |
| I | have | undertaken |
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| you | have | undertaken |
| he/she/it | has | undertaken |
| we | have | undertaken |
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He was responsible for naming terpene and pinene, and for undertaking the first systematic study of pinene.
en.wikipedia.org His undertaking thus resolved itself into a reformation of Christendom.
en.wikipedia.org Both however denied -- while undertaking 40 consecutive disembowelment strikes -- that they had any particular person in mind.
www.independent.ie It is currently undertaking an experimental mission in a 575 km circular orbit at an inclination of 64.9 degrees.
en.wikipedia.org It is intended to put this undertaking on a permanent footing and to build it up as a clearing-house for bird-watching results in this country.
en.wikipedia.org